Material:PU Foam, Size:4*2.5CM/1.57*0.98inch, which is soft, comfortable and breathable (harmless to skin). Applicable age: more than 3 years old Adorable pattern, Squishy, Slow rising, Decompression, This is a great gift for your Boys/Girls. Please check the size chart before you confirm the order and we are always here for you. Please Pay Attention: As Owner of Brand Youngate, 'Xingtai M-power int'l trade Co., Ltd.' is the Only Authorized seller on Amazon. And other seller on this listing is illegal and counterfeit. The Quality won't be Guaranteed!