This purchase has been extremely frustrating.  We ordered the 36"x36"x36" size of these covers to match the patio cover from Wayfair.  A smaller size was sent, it didn't fit and we returned it, asking for it to be replaced with the size we ordered.  A very large size was sent, it didn't fit and we are returned it, asking for the size we ordered.  Another very large size was sent and we will need to return it.  We are giving up on Wayfair.