You can adapt standard interior doors to use as sliding closet doors. These doors come in 24-, 28-, 30-, 32- and 36-inch widths. The standard height is 80 inches, which you can trim to fit your closet's opening.
Are sliding doors standard size?
There is no one standard size for sliding glass and patio doors. When it comes to standard sizes, sliding glass doors will generally come in panels of two or three, depending on the space you want to cover with the door. ... The most common standard heights for 2 and 3-panel glass doors are: 6.6 feet (80 inches)