Long sleeve rouched button up dress

I wore this piece once, for my boyfriend’s birthday dinner; very comfortable & stretchy but still hugs the body’s natural curves. It just didn’t work for me because I don’t like having to wear dresses w/ spanx or shape wear and my bum is big, so this is something that rode up often w/ out shapewear applied underneath. It is a US size M, but could also fit a Us size S, & US size L as well.