Personalized So I'm Little, But I'm Gonna be a Big Sister Long Sleeve Creeper. There's a new sibling on the way, and that means you've been officially promoted from "Only Child" to "Big Sister." So I'm Little, But I'm Gonna be a Big Sister Long Sleeve Creeper - White, for girls who'll be getting their little brother or little sister soon. For chillier weather, dress baby in this soft long sleeve creeper in a great fitting 1x1 baby rib. 5.0 oz., 100% combed ringspun cotton, 1x1 baby rib. White is sewn with 100% cotton thread, Flatlock seams, Double-needle stitched rib binding on neck, shoulders, sleeves and leg openings,Reinforced three-snap closure on binding.