I am 5'5", 130 lbs, 34B for reference, and generally wear a small in tops but I ordered an XS in this tank. The fit is slightly off. The body of the tank fits perfectly by ordering a full size down from what I usually wear, but like another reviewer stated, the straps fall down pretty easily. I've also noticed both the front and the back bunch up easily, across the chest and mid-back, causing the shirt to sit awkwardly on your body. If I order an XXS, the body might be too tight for me, so I'm going to keep it. Just keep in mind, that this top might fit better in the chest area for those with bigger boobs. The powder blue is a beautiful color, though, and the material is my absolute favorite. Very breathable and lightweight.
Shaina recommended this style