I am a 30h size 12/14. Ordered a medium because I was unsure if this would help with support and I am due to get a reduction in Jan so wanted to be sure it would still fit then- but a large would have been good too (I have the blue backless banana leaf jumpsuit in large and that also works so do recommend trying a couple sizes around your normal size to see what feels best) it is super figure hugging but you will look AMAZING. So liberating to be bra free and your tatas really will look great and supported. It's a different look to how my boobs look in a bra -obviously- but no one will know & so nice to not have the cutting in look of bra straps on the back. This is well worth the money ladies. Super hard wearing and great quality.