... :20*22*4cm or as your requrements. Materials:wool,cotton fabric,vaccum catton,exothermic padding,embroider,usb cable. thick plush+heat ... don't harm your bodySpecifications1.hand warmer 2.use as mouse pad 3.pakaging with pp bag 4.good gift idea or ... heating material,warm your hand,when operating yourcomputer,USB charging,mouse pad warmer1.Warm your hands when the day is getting cold ...