SOFT AND BREATHABLE: Made from 100% soft cotton sateen with a 230 thread count, this fitted sheet will feel soft and gentle next to your baby's skin. Designed to fit standard US crib mattresses (28" wide x 52" long x 8" deep). FREE OF HARMFUL CHEMICALS: OEKO TEX certified. We lab test our fabrics, color dyes and construction to ensure the highest standards. PREMIUM PRINTING METHOD: Colorful, sharp details that truly look hand-drawn onto the sheet and remain vibrant wash after wash. CREATE THE PERFECT SCENE: Perfect for any new parent who can't wait to photograph their little one, this gender neutral crib sheet adds a whimsical backdrop to your photo. AS SEEN ON: The Today Show, Project Nursery, The Bump, and Pregnancy & Newborn magazine. Recipient of Cribsie Award, Motherly Loves Top Pick, Reader's Favorite for Baby & Children's Product News. Happy Birthday Moon! You don't look a day over 4.53 billion years. Illustrated with love by Swantje Hinrichsen, this gorgeous crib sheet invites your tiny dreamer to RSVP to the sleepiest party tonight. Rookie Humans crib sheets are designed to create beautiful and creative backdrops for babies. Each sheet is illustrated to be like a page in a storybook where baby is the protagonist.