Product ID: 16747587 Basic Dog Pajama Zebra XS: 11"-13" Chest, 10.5" Length SM: 13"-16" Chest, 12.5" Length MD: 16"-19" Chest, 14" Length LG: 19"-24" Chest, 17" Length XL: 24"-29" Chest, 20" Length 2XL: 29"-34" Chest, 23" Length Polyester Imported Item cannot be shipped to P.O. Boxes