The size of our pillows is guaranteed to fit most pillow inserts on the market, and features a hidden zipper for easy opening and closing. Our pillowcases have a playful and modern design, with cute rainbow, sun, rain, and moon patterns in yellow, navy blue, and pink on a creamy beige background. Making them the perfect decor for any nursery or bedroom! They are also made of premium, breathable, and environmentally-friendly cotton. (Insert not included.)