Crocheted with a soft acrylic yarn. Pom pom is removable if needed. Approximately for a 3-5lbs baby. 11” - 12” circumference, 4” height. Hat displayed on a 12” ball. Size based on average head circumference. Please measure if unsure of head circumference!!! Not all preemie babies follow these guidelines! Squeeze rim on hat to reshape. Booties made for a 3” foot. Handmade in a smoke free home.