Underoutfit shaping tank cami is a supportive, seamless layer that can be worn by itself as a tank or as a shaping, smoothing base for any outfit. Tank style with scoop neck in front and back can be worn with or without a bra. The stretchy, moisture wicking material has 360 smoothing throughout and an extra support panel for the tummy. Manufacturer says the size S is intended to fit dress sizes 0-2 and bust 24" to 28". It should be noted that these measurements are more commonly used for an extra small. The flat lay measurements before stretching are 12" armpit to armpit; and shoulder to hem 20 1/2"