I usually wear a Medium in the waist, Large in the boobs, and XL in the arms. I ordered a 1x just to make sure I could move my arms in a non-stretch material. It fits pretty snug, and the waistband fits my Medium waist perfectly, making it 3 sizes smaller than it should be. Additionally, this crop is not for tall girls. I'm just 5'8", but the pockets that should have fallen right below the boobs are positioned across my boobs. I can't put my hand in the pockets without groping myself. although it is soft, this material stunk to high heaven of chemical treatment and made me gag. The ONLY reason I am keeping this jacket is because my husband thinks I look extra hot in it and he deserves nice things.