A Bra That Fits, also known as ABTF, is a reddit community dedicated to helping people find correctly-fitting bras. The subreddit was created, "Because everyone that wants one deserves a bra that fits". It has more than 50,000 subscribers.
- Main article: How-to determine bra size
ABTF is where MyWifesBusty famously described the best way to determine bra size. His guide achieved roughly 1700 upvotes. In addition, when the guide was linked in the Best Of subreddit, the cross-post received 1085 upvotes.