Polyester Soft Fabric: The nursing pillowcases are made of breathable, soft and stretchy polyester fabric, which protects your baby's sensitive skin and fits standard size nursing pillows (not included) well Fits Standard Size Nursing Pillows: Designed to fit perfectly on standard nursing pillows that measure 22 x 18 inches. these pillowcases are carefully crafted to ensure a snug and secure fit, keeping the pillow in place during breastfeeding Personalized Design: Our nursing pillow covers come with cute and unique patterns, they are more fashionable, fun and eye-catching than regular solid color ones Easy to Install and Clean: The hidden zipper in the middle protects you and your baby from scratches. It takes only seconds to take off and put on. Machine washable Great Gift: Perfect baby shower or birthday gift! The nursery pillow covers can also be paired with our similarly themed blankets, curtains, crib sheets, changing pad covers, pillowcases and more to create a fun and unique nursery