Little Snugglers Diapers are available in size Preemie (up to 6 lb.), size Newborn (up to 10 lb.), size 1 (up to 14 lb.), size 2 (12-18 lb.), size 3 (16-28 lb.), size 4 (22-37 lb.), size 5 (27+ lb.) and size 6 (35+ lb.)