Threadrock Big Boys' This Boy Is Getting Promoted To Big Brother Youth T-Shirt Threadrock exclusive, short sleeve youth boys' tee Runs slightly small; consider going a size up; 100% preshrunk cotton *OFFICIAL SIZING* (width x length measured in inches): XS (2/4) - 12" x 18" | S (6/8) - 14" x 20" | M (10/12) - 16" x 22" | L (14/16) - 18" x 24" | XL (18/20) - 20" x 26" Size specs approximate due to manufacturing variations A perfect gift for the new big brother, or a fun way to make a pregnancy announcement