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Bikini Tops Size Chart

So you’ve found a swimsuit (or 5) that you absolutely adore—but you’re wondering: which size should I order? Here at TeenyB, we’re dedicated to making sure you have all the tools you need to make bikini sizing easy. Our Brazilian cut bikinis are designed to provide you with not only the best quality and fit, but a swimsuit that empowers you by highlighting your body’s natural curves!

Whether you’re gearing up for a week at the beach or a coastal getaway, there’s nothing better than a perfectly fitting and sexy bikini! Are you ready to find your perfect swimsuit? Just follow these simple steps to pick the best size and style for you!

How to Measure

In order to find your size, you’ll need to first take a couple of measurements. Grab a tape measure and measure the following. Ideally, get someone else to measure for you, and make sure the tape measure isn’t overly tight or overly loose. Keep note of all your measurements so you can reference them.


Make sure that the tape measure is straight, laying over the fullest portion of your bust. Wrap it around to your back, keeping it parallel to the floor, to get the measurement for your bust.


Similar to how you did your bust measurement, keep the tape measure parallel to the floor, and measure right below your bust. This is also called your “band size.”

Bikini Tops

If you don’t know your cup size or want to recalculate it, reference this easy tool with the bust and band size measurements you took earlier.

It’s important to note that all of our bikini tops are inspired by Brazilian style. They’re meant to be low-cut, have minimal coverage and a very secure fit. If you’d prefer more coverage, consider sizing your bikini top up.

Bikini Tops with No Underwire

This bikini sizing guide applies to our triangle, butterfly, halter, bandeau, and sweetheart styles. Go in-depth with all of our bikini top styles here, and use your calculated cup size.

TeenyB US UK Australia France Italy
XS* (0-2) A B A A A
S (2-4) B C B C B
M (4-6) C D C D C
L (6-8) D DD D E D
XL (8-10) DD E DD F E
XXL* (10-12) DD+ F+ E+ G+ F+

* Only available in select styles

Please note, our bikinis are Brazilian inspired and are designed to fit with minimal coverage and snug straps. They are cut low in front. If you prefer more coverage, we recommend sizing UP.

Special notes regarding sizing on specific styles

Style 720 – Enhanced Cut Triangle

  • Style cut with curvature on inside triangle for LESS coverage
  • Style runs small. Recommended sizing UP according to our chart
  • For those naturally endowed needing more support, we recommend #710 –Classic Cut Triangle
  • Not Available in XS

Style 910 – Butterfly Top

  • We recommend sizing larger for fuller coverage

Bikini Tops With Underwire

This guide applies to our demi, demi scrunch, and overlay styles. Use your calculated cup size and bust measurement.

TeenyB Size Cup Bust
XS A 30-32
S A-B 32-34
M B-C 34-36
L C-D 34-36
XL D-DD 36-38
XXL DD+ 38-40

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