So Relative! Unisex Baby I Love My Big Brother (Red Heart) Bodysuit Makes a great gift! Approximate sizing: Newborn (up to 12 pounds), 6 Months (12-18 pounds), 12 Months (18-25 pounds), 18 Months (25-30 pounds) 5.0 oz., 100% Combed Ringspun Cotton in a 1x1 Baby Rib Double-needle rib binding on neck, shoulders, sleeves and leg openings Reinforced three-snap closure for easy diaper changes