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Lounge Bra

Dress Size
X-Small XS
0 - 2
Small SM
4 - 6
Medium MD
8 - 10
Large LG
12 - 14
X-Large XL
16 - 18

How to Use The Bra Size Chart

ThirdLove offers over 80 bra sizes from a 30 to 48 band and an AA to I cup! Using your current bra size as a starting point, you can refer to the chart above to refine your fit.

When using the chart to find your bra size, keep in mind:

  • The band size increases as you move from left to right. Move left or right within the row if your band doesn't fit.
  • The cup size increases as you move from top to bottom on the chart. Move up or down the columns if your cups don't fit. In between cup sizes? Go up or down a half-cup!
  • Bra sizes that share a row are called sister sizes, meaning they share the same cup volume (though they have different cup letters). For example, the row with bra sizes 36C, 38B, and 40A all have the same cup volume, but have different band sizes. The same goes for the row with bra sizes 38H, 40G, 42F, 44E, 46D, and 48C.

Am I wearing my bra correctly? Let’s double check:

  • Am I wearing the bra on the loosest set of hooks?
  • Did I do the scoop-and-swoop method to ensure the breasts are fully supported in the cups?
  • Did I adjust the straps so that they’re comfortable on my shoulders? Loosening the straps can help to alleviate minor overflow in the cups and tightening the straps can eliminate minor gaping in the cups.
  • For more help, watch our Fit Expert give the insider know-how on how to make sure you're wearing your bra correctly.

How can I tell if my bra fits properly? Let’s check each part of the bra.

Band: The band should feel snug and comfortable on the loosest set of hooks. This allows you to move to the inner hooks to tighten the bra as it stretches with regular wear. The band should be parallel to the floor and should not ride up.

Cups: The cups should lay flush against your breast tissue without causing them to flow out of or gape within the cups.

Straps: The straps are tightened so that they fit snug and comfortably on your shoulders. They shouldn’t slip off or dig into your shoulders. The straps should also be positioned on the center of each of your shoulders — not too far on the edge where it can slip off and not too close to the neck where it can feel uncomfortable.

Underwire: The underwire should lay comfortably under the breast tissue providing support and without digging into the sides of the breast tissue or into the underarm area. The underwire shouldn't lay on your breast tissue or below your rib cage.

Gore: Also known as the bridge of the bra which connects the two cups, the gore should lay flush against your sternum. It shouldn’t hover over the chest or dig in.

Quick Tips and Fixes to Find Your Bra Size:

The band fits well, but the cups feel...

Too small: Go up half a cup (if you’re experiencing minor overflow) or up a full cup (if you're experiencing major overflow).

Too big: Go down half a cup (if you’re experiencing minor gaping) or down a full cup (if you’re experiencing major gaping).

The cups fit well, but the band feels...

Too small: Go up one band size.

Too big: Go down one band size.

Neither your cup or band fit...

The cups and band are both too big: Go down in the band and the cups. Starting on your current bra size, move to the left of the bra size chart for a smaller band and then move up to decrease the cup size.

The cups and band are both too small: Go up in the band and the cups. Starting on your current bra size, move to the right of the bra size chart for a bigger band and then move down to increase the cup size.

Still need help? Take our Fit Finder bra size quiz to get matched with your perfect fit in 60 seconds!

Not sure where to start? Chat, text, or email one of our Fit Stylists for fit assistance!