Faucets and Fixtures. Typical rough-in dimensions include measurements not only for the shower stall, but also for parts such as faucets and fixtures. Measurements can vary according to your personal preference. Typically shower heads rise 65 to 76 inches above the floor and faucet fixtures rise 46 inches.
http://www.ehow.com/facts_7674240_typical-shower-dimensions.html
A shower stall should be a comfortable size for the average person. Practical minimum is 36 inches x 30 inches without a door. Anyone taller than 6 feet would probably not be … comfortable with a smaller stall. Toilet stalls for public use in the USA are usually governed by the International Plumbing Code.
http://www.answers.com/Q/What_is_the_average_size_of_a_bathroom_with_shower_stall_only
We are building a walk in doorless shower now. Our shower is 4' X 8'. We have a long, narrow bathroom (17' x 8') and we put the shower at one end of the room to kind of square up the space. It is huge. I think 3' x 8' would have been wide enough but DH won the debate.
http://ths.gardenweb.com/discussions/2255645/dimensions-for-doorless-walk-in-shower-stall
I'd say that a shower head 5' to 5-1/2' from the shower entry if the spray points towards the opening, or 4' from a door with the spray perpendicular to the door, would put you in the 95th percentile of keeping the water in the shower.
http://ths.gardenweb.com/discussions/2255645/dimensions-for-doorless-walk-in-shower-stall
With a standard shower curtain height at 70 or 72 inches, adding a few inches will give you a good indication about your shower curtain rod height. With a standard shower curtain of 72 inches long, the curtain rod should be installed around 75 to 77 inches from the floor.
http://www.linenstore.com/blog/a-standard-shower-curtain-size-guide/
Either reason, you need to purchase and hang a new shower curtain rod and shower curtain. This has you wondering what the average shower curtain size might be. If you have ever bathed in a shower with too short or too narrow of a curtain, you know just how frustrating it can be.
http://www.linenstore.com/blog/a-standard-shower-curtain-size-guide/
Shower Curtains for A Bathtub Shower. Shower curtains are designed to fit a standard 60 inch long bathtub. An extra 12 inches added to the width give the shower curtain extra slack to accommodate ledges on the tub.
http://www.linenstore.com/blog/a-standard-shower-curtain-size-guide/
The Americans with Disabilities Act of 1990 sets the minimum size for a wheelchair accessible toilet stall at 60 inches wide and 59 inches long, with the toilet fixture set in the corner of the stall opposite the door. The length can be reduced to 56 inches if a wall-hung toilet fixture is used.
http://www.answers.com/Q/What_is_the_average_size_of_a_bathroom_with_shower_stall_only
My walk-in is 5' by 8, one of the corners is partially clipped at a 45-degree angle, and that's where the door is. The main shower head is on the clipped long wall, so the head is about 3-1/2' from the door.
http://ths.gardenweb.com/discussions/2255645/dimensions-for-doorless-walk-in-shower-stall
Based on an average bathtub size of 60 inches long, plus an additional 12 inches, the average shower curtain width is 70 to 72 inches. Using our Jada Shower Curtain photo for our example, to measure the width for your shower curtain:
http://www.linenstore.com/blog/a-standard-shower-curtain-size-guide/
average dimension of a shower stall
The average shower stall is 36 inches by 30 inches. The average dimension of a shower stall is 36 inches by 30 inches.