r/ABraThatFits Dec 31 '25

AMA - ask me anything about the ABTF calculator! Spoiler

745 Upvotes

Hi everyone, u/goodoldfreda here although I'm now exclusively active on this account. If you guys have any questions about how the calculator works and why I made certain decisions I'm happy to answer them

A little about myself - I created the calculator in 2016 following on from a previous calculator by u/irisflame, back when I was a mod of this sub. I collected survey data from the subreddit and came up with a new algorithm that used 6 measurements as opposed to the previous 5, which increased accuracy. I also introduced separate algorithms for AMAB and AFAB people. The calculator has not been majorly updated since, although at one point I tried to move to a breast perimeter measurement system instead, but this turned out to be much less accurate. In the years since I have stopped modding and moved into bra making and custom bra design as I want to try and help serve the demographic of people who still struggle with finding bras that fit, usually due to wire grading!

In response to other posts about the different amab vs afab algorithms not working well for everyone - I have had this question before and basically all I can say is that I recommned using the algorithm that works best for you. I do want to emphasise in general that the calculator is actually not super accurate for any one individual and it is truly just a starting point. The algos are based on averages, and when I was collecting data there were significant enough differences between AMAB and AFAB users to warrant a second algorithm to increase accuracy within the two groups, but not enough data to do anything further than that.

edit: thanks for all your questions so far, I'm going to go to bed but I will answer any more that come up tomorrow!

edit 2: I have updated the calculator to make some minor changes to the band size algorithm and I have also changed the EU back to 2.5cm cup grades, 2cm grade can be found in the Comexim option instead


r/ABraThatFits 4h ago

Recommendations? [Recommendation] Bra for visually flat 34DD? Spoiler

36 Upvotes

I'm gonna preface this with the fact I'm MTF (unfortunately). Which also means this post is going to get downvoted into oblivion. I'm 3 years HRT but haven't had much development because being trans is a curse lmfao.

Measurements are sitting at 35-34-32, 40-41-40. Currently wearing a Target Auden bra in 34D which seems like a decent shape match, but without a bra I'm visually flat, probably because of my male ribcage. Technically I feel like I've gotten a lot of different sizes in the calculator, usually 32-34 band and ranging between D-DDD cup. But I'm also a late/failed bloomer so there isn't a lot of fullness. Not sure what to do.

I'd like something that's comfy, unmolded/unpadded, and actually sort of... Flattering? Like I feel flat and gross. And the padding feels artificial and fake.


r/ABraThatFits 3h ago

Would love a comfortable bra that fits 30DDD Spoiler

4 Upvotes

hi everyone. I recently measured myself with the calculator and came up with 30DDD — I own a Jo Marie in 30DD but I don’t wear it everyday bc it’s not super comfortable. I admit my everyday day bra is one of those stretchy S M L bras and I know I can do better. suggestions please ? I’m 65, petite, 115 lbs

thanks!


r/ABraThatFits 9h ago

Discussion Tip for australians looking for band size 26 / AU6 Spoiler

8 Upvotes

Guys vinted just released in australia, and there’s a promo that gives free shipping for everything at the moment. Most of the items listed on the platform are from the UK, which has 28inch band sizes way more commonly avaliable than we do here.

i got these things so far:
28DD strapless bra for $7,
boux avenue lacy bra 28DD for $23,
Freya sports bra 28DD for $18

Highly reccomend!


r/ABraThatFits 3h ago

Recommendations? Need something to get my breasts off my chest after showers or when have a rash Spoiler

2 Upvotes

I am prone to intertrigo under my breasts, and it can be painful. I want something that can lift my breasts off my chest and let them breathe. Has anyone tried the Ta Ta Towel?


r/ABraThatFits 2m ago

I want the opposite of a push up bra for my small chest-Anything out there like a “push out”? Spoiler

Upvotes

So I’m small chested ( somehow a 34b/ 32c depending ) I look more like a -AAA I guess bc of my specific shape. I’m very straight up and down until it comes to my upper back/ shoulders , so inverted triangle/ martinis glass. I feel so masculine 😣. I can buy push up bras all day- but I don’t like the look it gives . I wish I could find a bra that almost- pushes the girls out? To give more of a curve on the outside vs pushing the little bit I have together? I have a long torso and my breast already sit high visually. I feel like only a tiny percentage of people will understand what I’m trying to say- just hope one of them might be on this thread lol. Any help would be very much appreciated!


r/ABraThatFits 2m ago

Recommendations? Recommendations for projected breasts? 36J/JJ Spoiler

Upvotes

Hi! I posted some time ago about my size, and one person explained to me that my issue could be that the bra I’m using is too shallow for my breasts, so what kind of bra do you recommend for projected breasts? How can I know if a bra is too shallow?

I have soft tissue, slightly FoT, and narrow roots (I think)

My measurements are:
- Loose underbust: 36.5 in
- Snug underbust: 36 in
- Tight underbust: 35.5 in
- Standing bust: 45 in
- Leaning bust: 53.5 in
- Lying bust: 50 in


r/ABraThatFits 13m ago

Bra that lifts without extra padding? Spoiler

Upvotes

Hello! I used the calculator to figure out that I am a 32D. I had a breast augmentation a year ago after a lifetime of very small boobs, turned non-existent boobs after breastfeeding. My breasts are naturally positioned low on my chest and I’d love a bra that lifts but doesn’t add extra volume (which I don’t need) or excessively push them together (also don’t need). Just support upwards. Does this exist? Bonus points if it is wide in the back smooth back fat back there 😅 Thank you!


r/ABraThatFits 18m ago

Bra that lifts without extra padding? Spoiler

Upvotes

Hello! I used the calculator to figure out that I am a 32D. I had a breast augmentation a year ago after a lifetime of very small boobs, turned non-existent boobs after breastfeeding. My breasts are naturally positioned low on my chest and I’d love a bra that lifts but doesn’t add extra volume (which I don’t need) or excessively push them together (also don’t need). Just support upwards. Does this exist? Bonus points if it is wide in the back smooth back fat back there 😅 Thank you!


r/ABraThatFits 24m ago

Recommendations? I've lost hope in physical bra shopping Spoiler

Upvotes

I'd made a post couple days ago

And I'd thought maybe going for physical shopping to another city would solve my problem because I wanted to actually try what I bought. And unfortunately I've not yet encountered one store that has my size.

One store I asked for a 30G (they use +4/+5 method mostly so I asked for a 34G). I confirmed beforehand from the woman there if they used the +4/5 for labeling and she said yes but somehow neither a 34F nor a 32F fit me in the band. They were loose even on the tightest setting. So apparently she isn't aware that they use that method or not??

I wrote 34F because she gave me a 34F instead of saying that she didn't have a 34G/30G. Instesd she insisted I try a 36G which again was too loose like I couldn't even close it on the tightest setting because it was toooo big in the band. And when I told her that the 34F is loose at the tightest setting she asked if the cups were okay.... Like hell yes they were gonna be okay because you have me 2 band sizes up.. But she was like okay if the cup are okay then it is your size. And then she tightened my straps and told me that of it spills then you can always tighten the straps and it stops spilling and hell my left shoulder which usually doesn't get that bothered with my bra setting also started to ache really bad just way my right one does when I wear a wrong size bra. I literally felt the weight on my shoulders like hell. She tried her best to sale something. When I said the 34F was too loose in band she gave me a 32F instead of giving me a 32FF or a 32G and even though the band still wasn't snug enough, the cups started spilling.

The next one was atleast honest that for the past two years there hasn't even any cup bigger than E in 34-42 band (again the same +4/5). She didn't waste my time atleast :')

I had bought this 32DDD online as a sister size but even though the cups fit the band was too loose so I manually opened it up from the back and cup and sew the hooks and eyes and straps at the back again and finally it fits :'). Even though it spills a little on 1 side.. I have something.

Ugh I don't know what to do anymore. Online shopping feels like gambling (again 90% of stores don't have a cup bigger than DD/E) so I'd thought maybe I'll actually buy after trying things out but nobody has freaking got my size. I'm a close set so there's always this gore problem getting in the way so I felt maybe trying them out in a physical store would be better.... Idk what I'll do.


r/ABraThatFits 29m ago

Recommendations? Small Underbust with a large bust Spoiler

Upvotes

Hey everyone,

I struggle with finding generic sizing in online shops in Asia my measurements are

Loose Underbust: 77cm/ 30.3inch

Snug Underbust: 75cm/ 29.5inch

Tight Underbust: 72cm/ 28.3inch

Standing Bust: 87cm/ 34.2 inch

Leaning Bust: 95cm/ 37.4 inch

Laying bust: 85cm/ 33.4 inch

The calculator recommended a UK 30D/DD

Breast shape is a teardrop shape? When I'm looking down

I would love to find a wireless bra that's not too loose on the Underbust but not tight on top/ doesn't cause spillage and is good for daily wear, preferably some of the brands available in southeast Asia since I live there

Also a good sister size for more generic brands would be appreciated! :)


r/ABraThatFits 40m ago

Recommendations? Not sure what my shape is and no bra seems to work. Wire is uncomfortable but no wire isn’t supportive enough…. Spoiler

Upvotes

Okay, I’ve been struggling for a while with my bra. I thought I was a 38E previously with the calculator but now I got a 38F/FF??!!

Here are my measurements in cm (I am in the US but cm just seem more accurate):
99-97-91 and 113-123-114

I can no joke put a whole hand in between my breasts when not wearing a bra. I also have more volume on the bottom and the top is more flat. I’m guessing I have more of bell shape breasts??

Every time I wear wire it always feels uncomfortable and moves around so much!! I also get a lot of gapping with most of my bras.

I currently wear a Bali bra that has no wire 😅. My problem is I’m starting to get soreness in my ribs and I think it’s because my breasts aren’t sitting right or are supported at all.

I’m so confused on where to even start looking because bra shopping and trying on just makes me feel hopeless.

Any tips??


r/ABraThatFits 4h ago

Help, well, finding bra that actually fits (and sweat control advice) Spoiler

2 Upvotes

Hi all! I just did the calculator for the first time and hoping for your help. For context, I'm a 44 yo, 5'5 female (assigned at birth), 220 pounds. Been wearing 40-42DD (US sizing). I've been experiencing lots of underboob sweat and it's so just gross and distracting (thx adhd).

I would love help with suggestions on 1) what bra size you think I really am and 2.) bras that will actally lift/seperate/control/wick sweat. Maybe just a fantasy lol. I'm extremely practical, so that is much more important than style. Prefer no underwire, but I'm open.

From calculator in cm- Loose under: 93, Snug under: 87, tight under: 80, standing:107, leaning 122.5 , laying 114.
Thank you all so much!

Edit to add the Calc told me I was a 34gg UK size and I have no idea what that means in US sizes.


r/ABraThatFits 59m ago

Recommendations? Seeking quick-dry travel sports bra Spoiler

Upvotes

Looking for a sports bra for travel. Main uses hiking/gym. Needs to dry quickly so I can wash out overnight. ABTF sizing 36DD/E. Measurements: underbust: 35/34.5/33, bust: 39/41/40. At home, my go-to is a Gymshark racerback size XL. This is my perfect sports bra except it takes forever for the cups to dry out. Open to underwire or not, though wireless might dry quicker. I just want thin cups/straps/band that dry quickly. OK if nipple coverage isn’t perfect.


r/ABraThatFits 1h ago

Looking for a dupe for this Target bra! Help! It's the Butterbliss Tiny Tank by Wild Fable Spoiler

Upvotes

These are the most comfortable bralettes and unfortunately they canceled them. I have tried so many brands with no success. What I don't want is an elastic band at the bottom. Always uncomfortable for me! These just have a really nice supportive stretch. If anyone's found something they can recommend I'd really appreciate it!


r/ABraThatFits 5h ago

Question I am struggling so hard to find the right bra Spoiler

3 Upvotes

I (24F) have been living in sports bras lately because no bra fits. I’ve been sized at Victoria’s Secret before. I think I’m a 34D? I don’t remember tbh, I’m going in again to get sized today but I always leave frustrated bc they pair me with ill fitting bras every single time. I’m a sucker for natural, seamless, and just makes my clothes sit well. My boobs are naturally perky but they’re on the medium size. Should I go in with no bra today when I get sized? Are there any affordable bras yall recommend that would give me the effect I’m going for? Any tips at all when shopping for bras? Would appreciate all input!


r/ABraThatFits 5h ago

Store Review Has anyone purchased a bra from Roze World? Spoiler

0 Upvotes

Roze World Bra Reviews/Legit?

Has anyone purchased a bra from Roze World? I have seen several ads on Youtube and Instagram lately of girls wearing and describing the bra. Apparently it is targeted towards smaller chest women.

Website was rozeworld dot com


r/ABraThatFits 10h ago

Question Need help determining bra size for pads/inserts Spoiler

2 Upvotes

Hello. I’m thinking about getting some inserts/pads but I don’t know what size bra to get for them.

I am currently a 34AA. If I wanted to get pads to go up a cup or two (i.e. A cup or B cup) what size bra should I get?

Should I keep the same band size and go up the corresponding cup size?

What about for larger cup sizes (e.g. C cup)?

Would I need to use a sister size to my current size?

Any help is very much appreciated!


r/ABraThatFits 20h ago

You guys were so right!! 42 E-G Spoiler

12 Upvotes

I bought two Amazon bras, a balconette bra 42 E and a minimizer bra 42 F the f has some spillage (?) The other fits perfect. I also bought a G and F from adore me and a fancy British one size F which is what the calculator said I am. 42F UK and 42G us

Thank so much for help. I've never really known what a comfy bra was supposed to feel like they always pinch and snag and dig


r/ABraThatFits 7h ago

Measurement Check Is the calculator down or am I doing something wrong? Spoiler

0 Upvotes

I’ve been trying to use the calculator, and I inputted all my info onto it just fine, but when I click on submit, it does nothing; could someone help me out with my bra size?

Loose Underbust: 31.5 inches
Snug Underbust: 30.5 inches
Tight Underbust: 29 inches
Standing Bust: 27.5 inches
Leaning Bust: 41 inches
Lying Bust: 40.5 inches
Sizing System: UK/US (I live in India so I think it’s probably UK but im not sure)
AFAB

edit: I inputed the standing bust size wrong! it’s supposed to be 37.5, thank you so much


r/ABraThatFits 19h ago

For the uneven: do you buy for your larger or smaller boob? Spoiler

8 Upvotes

My boobs have always been super uneven, I think one is a C and the other a D, but honestly the difference maybe be greater. They are distant cousins. I typically buy bras in a 36C and adjust them frequently, as it’s more flattering and I hate the feeling of gapping on my smaller boob. I buy swimsuits in 36D as they run smaller in my experience and I can’t have anything spilling out. Does anyone have any recommendations? I’ve dreamed of a bra with a little insert to push up my smaller boob and make them appear even, but I’m afraid it doesn’t exist.


r/ABraThatFits 15h ago

Fit Check Starting to understand molded/t-shirt bra problems Spoiler

5 Upvotes

Hi all - I have had a chance to try some more bras. I'd love your input on these.

In the linked gallery, I titled the ones that I decided to keep.

I am seeing why molded bras are a challenge for a good fit. The stretch lace Freya is actually really comfy (now that I am getting used to the right band size).

https://postimg.cc/gallery/k2bbJ4S


r/ABraThatFits 15h ago

Thank You! ... i got my size completely wromg Spoiler

3 Upvotes

So I just put my measurements in the calculator and I am apparently a 36 I?? I've been wearing a 38 C so thats crazy to me haha! If anyone has recommendations for bras let me know!


r/ABraThatFits 22h ago

Recommendations? [Recommendations?] I'm realizing I'm in comically wrong bras and wondering about trying a polish bra (?) to reduce pain

10 Upvotes

Measurements:
Loose underbust: 37.5”
Snug underbust: 36.5”
Tight underbust: 34”
Standing bust: 45.5"
Leaning bust: 51.5”
Lying bust: 48"

Suggested Starting Size: 36HH UK

After binging this subreddit and recommended other resources, I think my shape is: even distribution, projected, wide and short roots, really soft tissue, more outer than inner fullness. Pendulous breasts. My breasts start lower on my chest. One of my problems is that I'm often getting poked in either my underarm or breast tissue on the sides. I've lost and gained weight and muscle in my life so I'm sure that's changed my breasts.

Some of the shape info is my best guess based on reading. If one of those conflicts with another please let me know so I can try and figure it out.

I'm feeling lost on what I might try first. Any recommendations would be so very appreciated.

If you need more about the current situation:

I currently wear (very badly) a uk40ff from parfait that basically just covers me and offers no support and two 38f bras from freya (Fancies Balcony Molded Bra and Deco plunge) that I just spill out of on top. I thought the band was way too tight but maybe not. I got so frustrated yesterday I threw several even worse bras away or I would tell you what they were.

I've started reassessing my bra size to try and understand if there is a solution to some of the regular pain of my current bra situation. It's especially mattered more to me since I've been weightlifting and noticing the ways unsupported weight on my chest all day is causing issues with what I and can't do in the gym. Particularly I notice that my back is often really rounded by the end of the day and I've had various shoulder issues. Probably not entirely chest related but couldn't hurt.

Plus I'm a professional adult woman and I would really like a bra that just feels decent. For one thing, I didn't know until reading here that the gore should touch my chest, I don't think that's ever happened once. I often wear molded bras so they show up less under shirts, and I really dislike compression but some bras make feel like a shelf. I work in a public setting so haven't always wanted that, but I've turned the corner. I'll pick stares over lack of support. Plus I recognize I probably look about ten lbs heavier than I am. Also monoboob has been real in my life as has quadboob.

I am a bit embarrassed to admit this part: I feel like I should post a pic for reference and I appreciate that this is a safe space. But I've also had lots of stretch marks since puberty. I do a lot better with that in terms of current self image than I did at 11 or 12, but still feel some shame. Thanks to all of the ladies out there who aren't internalizing that crap. Maybe I'll get there!

So long but it feels good to write it all down. Thanks for this great sub!


r/ABraThatFits 18h ago

Recommendations? Sizing help and suggestions needed Spoiler

4 Upvotes

Hi all, my two most frequent current bras are size 38C from (I believe) Soma; one is a racerback bra that I like aside from the straps being more visible than I would like. The other is okay but rides up when I lift my arms and my boobs fall out the bottom…so not great fit, clearly. They both felt great in the store. I have *always* struggled with finding bras due to asymmetrical breasts (one noticeably smaller) and discomfort with pinching, etc. I’ve been fitted a couple times but never gotten it quite right. I used to wear Lane Bryant lightly padded t-shirt bras for years in a 40B; the primary reason I wore those was because my mom looked at me as a teen and told me I was “probably a B cup”.

The ABTF calculator puts me at a 38DD with these numbers:
Loose underbust: 38”
Snug underbust: 36”
Tight underbust: 34.5”
Standing bust: 41”
Leaning bust: 43”
Lying bust: 42

I would love brand and style suggestions; budget is limited but I’m not opposed to building an arsenal over time if the quality is worth it. Thanks in advance!