This dress is sold out in US, I bought it from Hansen Gretel from Australia. This is a size M. It is made of 100% silk (fully lined), the design is super sexy and flattering. Worn once. It would be best fit a size S-M and roughly like a US 4-6 For reference I wear reformation size 4 and Realisation size S. This dress fits me fine with a little bit room so it should be fine to fit a size 6 too.