http://www.gradshop.com/green-kindergarten-graduation-cap.html - Green Kindergarten Graduation Caps. Graduation ceremonies are special occasion which is why Gradshop is pleased to offer the green mortarboard cap for all kindergarten graduates. The cap is made from high quality tricot fabric to match the shiny tricot grad gowns. The mortarboard measures 9.4"sq and includes elastic at the headband to fit all young kindergarten graduates. Take advantage of bulk order discounts when you order online and save.