Tanks

Our tanks are true to size. If you have bigger boobs, like a DDD or more, I would size up. It won't fit that different, and it just gives you an extra bit of coverage on the boobs. 

 US size UK size Buttercup size
0 - 2 2 - 4 XS
4 6 S
6 8 M
8 10 L
10 12 XL

 

Bloomers 

Our bloomers are true to size. If you want a baggier fit, size up! I personally like to wear these as my everyday undies so I get them true to size. UGHHH they're so comfy I hope you like them!!! Here's a chart: 

 US size UK size Buttercup size
0 - 4 2 - 6 S
6 8 M
8 10 L
10 12 XL

 

Bras

Ok, first of all, I highly encourage you to get an accurate bra size reading using this calculator: www.abrathatfits.org. It only takes a couple of minutes and really helps you get a good sense of how big your boobs are. You might be surprised! I feel like a lot of us just get our boobs measured once in a Victoria's Secret when we're in middle school and then just kind of move on with our lives. Anyway, now that you have your bra size, here's how to convert it to Buttercup sizing:

 Band Size Buttercup Size
28 XS
30 - 32 S
34 - 36 M
38 - 40 L
42 - 44 XL

 

Cup sizes are pretty intuitive. If you're an A-C, get the A-C cup. If you're a D-DDD, get a D-DDD. If you're an F-G, we are working on a bra for you!

 

Thongs

Our thongs run small, so please size up! Also remember that sometimes your butt size doesn't align with the rest of your clothing size. I usually wear an XS for pants and a small for undies, but I wear a medium for these guys. Here's a chart:

 US size UK size Buttercup size
000 - 00 0 - 2 XS
0 - 2 4 - 6 S
2 - 4 6 - 8 M
6 - 8 8 - 10 L
10 12 XL