The Summer Metal Banister and Stair Safety Dog and Baby Gate fits openings 31” to 46” wide and is 32.5" tall; featured on Babylist's "Best Baby Gates for All Your Childproofing Needs" list With the dual installation kit, the white metal gate can be attached to a wall or to most single and double square and round banisters; no drilling required on square banisters This baby gate accommodates banister-to-banister and banister to wall installation at the top or bottom of stairs, as well as installation in doorways and hallways Adults can easily open the toddler gate one-handed; the door opens the entire width of the gate so it's easy to walk through and the no-threshold design minimizes tripping