Note: Please allow small error due to manual measurement. Thanks for your understanding. specification: Item Type: Hair Dryer Diffuser_x000D_Material: ABS_x000D_Inner Diameter: Approx.8cm / 3.15in_x000D_Outer Diameter: Approx.11cm / 4.33in_x000D_Bottom Size: Approx.16.5cm / 6.50in_x000D_Height: Approx.14.5cm / 5.71in_x000D_Advantages: Large diameter, heat dissipation rapidly, adjustable air volume, styling and drying curly hair, good compatibility. Features: 1Using this hair dryer diffuser to blow your hair, you will get a bouncy, charming and beautiful curls. 2Makes the heat distribution more even and larger, making the hair styling easier. 3Can easily handle all kinds of curly hair styles and make the hairstyle effect is more lasting and stylish. 4Rubber gear design, better to protect the hair dryer and prevent scratching. 5You can use the diffuser attachment to blow your hair like the professional salon at home. PackageList: 1 x Hair DryerDiffuser