Hi Mary! Thanks for your question. This wall is around 54" tall, but I can get you an exact figure if it will be useful. It is somewhat lower than is customary for showers, which helps the space of the room flow better - it looks more roomy overall. Sorry about the delay - we have just discovered a cache of unanswered questions deep in our profile site. I am going to work through them all as quickly as possible.
Good luck with your project, and don't hesitate to write me at "davis@pauldavisarchitects.com" if the precise height is good for you to know.
Paul Davis Architects