Head Material: Canvas Outside, Polyurethane Inside(Polyurethane is a New Organic Polyer Material), Polyurethane Has the Characteristis of Light Weight, So You Mistake It As Foam, It is Completely Different from Foam and Better than Foam Head Circumference: 22" (Measure Like The Picture) Height: 31.5cm Color: Off-White Head Aplication: Very Easy and Convenient to Use, Great for Wig Making, Fixing Wig Making, Styling and Display Head Installation: Base with Mounting Hole Easy to Install and Match with Any Wig Clamp Tight Head Advantage: Poly Urethane is more DURABLE than Styrofoam, Head Lights but Strong, Very Durable, Very Sturdy, Wig Head Won't Flake When Pins are Inserted