In most cases, the best height for huppah poles is 8 feet. That gives you lots of space under the canopy, and this size works for most conventional hotels and wedding venues and for ceremonies held outside. The poles in the photo at left are 8 feet tall.
However, some small spaces require 7-foot poles, such as many inns, private homes, and cruise ship spaces. Huppahs.com has rented huppah poles for ceremonies in all of these types of venues.
Your contact at the venue or your wedding planner will be able to tell you the height of the ceiling in your ceremony space.