GEX had design patent for the basement, more stable when you use it; Updated black rubber circle and shining gold GEX symbol, looks more decent. Quality Material: High-density canvas outside, 100% cork Inside, easy to put T pins in and out when you are making wigs and fewer pinholes will be left on the surface. Canvas Head Circumference: 22″ (Measure Like The Picture) Height: 10″ Color: Black.