5'10 and 103lbs long legs and long torso. I got an XS, I usually where an XS. this dress fits my body perfectly, the dress falls beautifully leaving the tiniest gap before touching the floor, the sleeves aren't too small at all but fit all the way down my arms correctly, and the slit starts high on my waist that creates a sexy natural opening in the dress that defines my tiny curves and long legs. I feel like a model, shorter sizes (5'4 and below) would need to get the dressed fitted and tailored