Here’s my best seller for decks, “hand’s down”! Most sliding glass doors measure ~42″, so my 48″ length grabs traffic all the way across! 30″ of “time on the mat” works on all the footwear debris they can try to drag in! Matman says: “Leave that dirt OUTSIDE!” Have you got SAND coming in? Stop destroying your tile, vinyl, carpet or wood- this mat traps sand, period!