The special material protects your keyboard well The material is thick enough to protect the piano keyboard from harmful dust and debris, dirty, pets scratches, or sunshinie. The cover is very soft with light weight, it will not bring extra pressure on the keys. The stretchy design makes for a perfect fitting The cover is perfectly stretchy. it is fit for most 88-keys piano keyboards. The length side is 49inch, which can be stretched to 55inch. The width side is 11 inch, which can be stretched to 18inch. The height is 7 inch. On the bottom edge, there is eslastic tighting cord, which can cover the edge snuggly on the bottom. Product Specifications >Color: >Size: 49-55(L, stretchy)x11-18(W, stretchy)x7(H) Fit for: CASIO PX-A100,PX135,PX150,PX160,PX350,PX358,PX360,PX560,PX760,CDP130... YAMAHA P Serials, including P-115,P-45,P-48,P-35,P-85,P95... YAMAHA DGX Serials, including DGX-650,DGX-660... YAMAHA KBP Serials, including KBP-1000,KBP-2000... Roland F-20, FA-20, FP-30, FP-90, MP-100, RD-800... Any other 88-keys piano keyboards