The Essential Tank is crafted from heavyweight, premium cotton rib. Stretchy with soft compression for a supportive fit and much thicker than your average tank. Models are listed below in order of appearance: Kamryn is a size 4 and 5'4" wearing a S. Her measurements are: 31"/26"/39" Preet is a size 8 and 5'4" wearing a L. Her measurements are: 40"/29"/42" Alexis is a size 14 and 5'6" wearing a XL. Her measurements are: 43"/36"/45" Mona is a size 4 and 5'9" wearing a M. Her measurements are: 32"/27"/34"