This is a diaper cover. It's one size, so it should fit from newborns to big sizes. You'll need an inner layer if you use it with cloth diapers. You can also put a cute cover over disposable diapers. I bought these for emergencies, but I haven't needed them, so I'm selling them. The blue bear-patterned one in the front has been washed but is unused; the other two are new and unused, and haven't been washed. Please purchase only if you understand that these are stored at home. These are colorful animal and floral patterned diaper covers with adjustable snap buttons for convenience. - Colors: Blue, Green, White, Red, Pink - Designs: Animal patterns, floral patterns, colorful - Material: White waterproof material on the inside - Size: Adjustable with snap buttons Thank you for looking.