After measuring carefully, we chose this width for our shower and they fit perfectly! They were a beast to maneuver, but the installation went smoothly and we were really thankful for the great video that detailed each step. The only hiccup was when levelling them - the little silicone pieces kept moving out from under the door and made it really hard to keep it level and steady while we marked hinge holes. The door also crushed them immediately, rendering them useless. We cut a bunch of wood shims instead and they worked better. The silicone helped to stabilize the door after installation, and after a few weeks of use they are still perfect and we love them.