I ordered a size up originally, I'm a 34 dd, and order 36dd. It was tight, a bit more than I thought I could live with for a few hours. So I switched it out for a 38 dd, which fits perfectly. It's a good fit and wearing it around the house for a bit, didn't require me to adjust it. It's comfortable and easy to wear. Previously never cared for strapless and would wear the clear bra straps when possible. But this changed things for me and I'll be wearing strapless stuff more often now.