Pip+Phee Standard Pillowcase - ZamboniPip + Phee Bamboo Standard Pillowcase (26" x 18") Provide your child with a soft, breathable, and hypoallergenic sleep surface with the Pip + Phee Bamboo Standard Pillowcase. Sized at 26" x 18", it fits standard pillows perfectly and features an envelope style opening to keep the pillow securely in place all night. Key Features Premium Bamboo Fabric: 95% bamboo viscose and 5% spandex for a silky soft, breathable, and moisture wicking surface.