So Relative! Navy Blue I'm Going To Be A Big Brother Kids T-Shirt 100% Cotton Youth & Toddler sizes: 2T, 3T, 4T, X-Small (2-4), Small (6-8), Medium (10-12), Large (14-16), XL (18-20). Baby/Toddler sizes run small, please order a size up. Cool vintage/distressed print. Fun way to tell people about a new baby on the way! Makes a great gift! Excellent quality, comfortable and Cool vintage/distressed print. Fun. Double-needle stitched neckline, bottom hem and sleeves