But if you get that measurement wrong, it is very difficult to reverse previous work.

Learning about commonrough-indoor sizes will make the installation go smoothly and clean.

Bypass Door Sizes

Sliding shower doors range from 45 inches to 47 inches.

Glass shower door in white marbled bathroom with white tub and large window

The Spruce / Christopher Lee Foto

Wider sliding shower doors will be 57 inches to 59 inches wide.

Most shower doors are 79 inches high.

Alcove shower/bathtubs commonly are 60 inches wide and theirbypass or sliding doorsare usually about 58 inches.

This dimension might be direct-to-stud or between two wall coverings.

Direct-to-stud installation refers to apre-fabricated unitwith coordinated surround walls that screw directly to uncovered wall studs.

With this throw in of installation, the shower/bathtub itself is slightly less than 60 inches.

This gap varies from one manufacturer to another but usually is around 59 7/8 inches.

Other alcove installations have wall coverings such as drywall or cement board on the studs.

On the left and right side of the shower door is a metal frame.

In practice, though, most residential frameless shower installations tend to stay within certain prescribed dimensions.

Measure in two places: at the top and at the bottom.

Go with the largest of the two measurements and round up to the nearest 1/8 of an inch.

For height, measure from the side of the bathtub/shower or from the curb on showers.

As with the width, measure twice: once at the left and once at the right.

Choose the largest of the two measurements and round up to the nearest 1/8 of an inch.

That said, you should still get this measurement as accurate as possible.