I’m 5’5, weigh about 200lbs, and that’s because like half of my weight is on my boxer arms, I got a size L thinking the arms stretch and baby, they don’t, now I’m on a strict diet so they can fit more comfortable. Overall, the dress (aside from the sleeves) is comfortable and hugs my curves, if you have regular arms, purchase the size you usually wear, if you have massive arms like me, up the size.