It only makes sense that baby's sheets are as soft as their PJs! Introducing Pip + Phee Bamboo Crib Sheets! These crib sheets are designed to fit a standard size North American crib mattress & we didn't "cut any corners" when perfecting them! * 52" x 28" * 95% Bamboo, 5% Spandex * The perfect amount of stretch for a nice, snug fit on even the deepest mattresses * Thick, high-quality 360° elastic keeps mattress in place * Ships in bamboo reusable sack for storage (or just use it to store diapers, wipes, toys, etc.)