Fits truev to size I am 5’6 160 and I fit a medium

I listened to Ruby in the comments, she said it runs big so I went a size down. I regret it! the very end at the bottom of dress is soooo tight around my thighs and it's noticeable. I literally have to stretch the dress out so that i'm not walking like a penguin. I should've went with a Medium. I weigh 145, I wear a 7/9 in pants and a Medium in dresses. Other than that I love the dress!