Kirkland Signature 100% Supima Cotton 540 Tc Qn 6pc Sheet Set Material: 100% Premium Cotton grown in the USA Thread Count: 540 Single ply yarns Sateen weave Fits mattresses up to 18" deep Flat Sheet: 90 L x 106 W, Pillowcase: 21 L x 33" W Fitted Sheet: 60.5 L x 80.5 W + 15.25"