Praise Be to those who wrote before me! Lol. I went by the size guide and other reviewers to choose a small. I'm 5'2, 120-125lbs, measure 35-29-38. I really like this jumper. The fabric is nice, the fit is perfect, and it has pockets, PTL!! My only concern is the light elastic in the pant leg. The legs are full length, and you can wear them up or down. Because the leg elastic is very light, I have a feeling I'll be pulling them back in place throughout the day.