Grow In Grace Doormat Insert. Attractive And Inspiring, This Doormat Insert Fits Perfectly Into Our Doormat Base To Create A Look You Will love; this doormat insert fits snugly side to side, with a little gap on the top and bottom, so as not to create a tripping hazard. Made With Mildew-Resistant Polyethylene Terephthalate Fibers, It Helps To Quickly Clean And Dry Shoes. Rubber Backing Holds Insert Firmly In The Base. Size Of Insert Is 21 7/8 x 9 7/8. Insert Only - Doormat Base Tray Sold Separately.