LARGE DOOR STOPPERS: Each door stopper measures 4.8 (L) X 2.2 (W) X 1.2 (H) and fits any door with clearance up to 1.2. These door stoppers allow you to move freely in between rooms of your home, school, or office, without having to open and close your doors every single time. WORKS WITH ANY DOOR ANY FLOOR: These sturdy non-slip door stoppers are made for wood, glass, and steel doors and they work well on floors like hardwood, carpet, concrete, tile, linoleum, stone, asphalt, and ceramic providing superior clench. ENHANCED AND REINFORCED: All Our door stoppers rely on a sloped design to keep doors from closing on their own. They fit under most door gaps if you double them back to back, and will withstand daily use without cracking apart. A clear-cut reinforced skirting around the door stoppers and the enhanced hollow design which enables double stacking makes it hard for these wedges to topple. NON-MARKING, ANTI-SLIP WEDGE : Protect your home or office floors with these abrasion-resistant door stoppers which wont slip or scratch even on those heavy duty Industrial doors. Keeping your kids, babies and pets safe from slamming doors. STRONG, DURABLE, AND NATURAL RUBBER: These door stoppers are made of strong flexible rubber, thick, ROHS, and durable, not easy to deform, and are made to last for many years to come. These heavy rubber jam with a unique design provides optimum friction to keep the door deadbolt.