Then Sings My Soul Doormat Insert. Attractive And Inspiring, This Doormat Insert Fits Perfectly Into Our Doormat Base To Create A Look You Will Love. 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, SKU# 20018.