9-1/2" x 4", Gum Rubber Grout Float, Non-Stick Gum Rubber Ensures Smooth Application, 2 Rounded Corners Prevent Gouging Of Grout Joints, 2 Square Corners Ensure Complete Grout Coverage In Corners, Extra Thick Aluminum Backing Plate For Maximum Leverage & Applying Grout Into Joints, Premium Gum Rubber Laminated To Lightweight, Closed Cell Core Is Built To Last.