I am between a 2XL and 3XL, and bought these in a size 3XL. These are so light and comfortable! Perfect for wearing under dresses or just to lounge around in during the spring and summer. These are slightly transparent if you have a larger hip/derriere region, however, so if you are a little bottom-heavy be wary of bending over too far without suitable underwear. Otherwise, I love these and will probably buy more!