I’m 5’3, 150lbs. I have a bubble butt, a little hippy and thick thighs, small waist, flat stomach. My arms are medium size. I ordered my normal size small. The jacket was a little tight in the arms but fit fine. The pants… could not get them over my butt and they were tight in the leg area. If they had even a little stretch, I think that would’ve made a difference. But without any stretch, I think you would definitely have to size up. The suit itself is BEAUTIFUL which is why I reordered in the medium. Hoping that I can get the pants on and then make any necessary alterations