SOL'S COLUMBIA KIDS, 80% Cotton – 20% Grs Certified Recycled Polyester Round Neck,Set-In Sleeves,Cut And Sewn,1X1 Ribbed Cuffs, Neck And Bottom,Jersey Half Moon And Neck Tape Inside Collar,Relaxed Fit (1) Grey Melange : 73 % Cotton / 20 % Recycled Polyester / 7 % Viscose.. About Sizes Matching, Please Refer To The Size Chart In The Product Documentation Section.