Right now I have no idea how Ill solve this problem but since I dont have the original packaging, I cant return this item. I use it twice daily morning and night. LOL Im assuming that, since they are "unisex" they are wider than the normal Medium width to which Im accustomed in the Kadee IIs. I received the slippers today. It comes in a really nice case kind of hard to open at first but dont worry the mouse is very secure. Thats a lot of money for a plastic audio mixer with a little extra tech. But assess your use case before buying. The item brought would not work, on requesting to return this product the seller is relluctant to have it returned. They are about 8-1/8" and 10-1/4" . The light itself is super bright and a great secondary light, i still have bike fixed lights but given i know this is always going to have charge in it i find that i worry less that my main lights will go out because i havent charged them twice that day already.