Star Wars Big Boys Stormtrooper Long Sleeve T-Shirt 100% cotton Star Wars big boys long sleeve tee Stormtrooper graphics Cuffed long sleeves, solid back with no print, tagless design 100% cotton Officially licensed. Big Boys sizing 8-20. Flat measurements. Small: 16" across chest, 21" long. Medium: 17" across chest, 22" long. Large: 18" across chest, 23" long. X-Large: 19" across chest, 25" long.