A: The DreamLine Butterfly 58"-59 1/2" is designed to fit 58"-59 1/2" finished opening and will not fit a 60" finished opening. This particular model has been discontinued. The above description of Butterfly 60in. x 76 3/4 in. is actually the Backwall kit sizes. DreamLine is available to answer any technical questions, address warranty issues or provide installation assistance. Please call our Support Department at: 1-866-731-2244 or email us at: support@bathauthority.com Monday-Friday 8am-7pm EST