I’m 120lbs, 5’1”, 34C and wear between a S and M. After reading the reviews about how it runs small, I still decided to buy this set but in a Medium instead of my usual Small because it’s super cute. It is definitely true that it ran small because even the Medium fits me snuggly. Although it looks even better than the photos, nobody mentioned was the square crystals have sharp edges that poke into my skin and causes me to itch only after trying it on for a couple of minutes. I am an afraid it will be uncomfortable if worn for an extended period. With that said I do love the outfit enough to keep it but I am considering maybe finding a sheer long sleeve crop top to wear underneath it.