Engineered to ensure a proper fit on one- and two-piece toilets, this KOHLER® Brevia toilet seat complements a wide variety of elongated toilet designs. Unique Grip-Tight bumpers hold the elongated standard toilet seat firmly in place and prevent shifting. Elevate your experience with KOHLER. Kohler® Toilet Seat, Series: 20112, Brevia™ Collection, Elongated Bowl, 18-5/8 in Bolt to Seat Front, Closed Front, Plastic Hinge, 14-3/16 in Width, 19-5/8 in Length, 7/8 in Thickness, Plastic, White