My bike is small so it is a tight fit but it works. These are good quality shoes. I kept the set rather than return it thinking that it will probably shrink after washing and drying. I see a lot of this "style" of slipper being made out of a fuzzy type of fabric My previous 2 orders of those kinds of slippers the fabric inside on the sole of them are slippery HOWVER as soon as i slid my foot into these slippers I knew i would not have that slippery problem AND I dont wear socks with my slippers either. I apparently bought this while I was a few sheets to the wind and was surprised when it showed up. Overall nice, top looks like fake wood but does the trick. AHORA YA SÉ QUE ESTOS DISPOSITIVOS HAY QUE COMPRARLOS EN UNA TIENDA DIRECTA, PARA HACER VALIDA LA GARANTÍA. Shrinks after first wash and dry. Just handle them like you would a museum piece, not a pair of kid headphones. a 12 is just barely too small and can get uncomfortable but.