Portable pipe measuring tapes are used by workers and inspectors in the oil and gas drilling industries. Also by plumbers, tree arborists, and hvac workers. These people need to know the diameter of an installed pipe, without having the luxury of seeing an open end. All these people need a pipe measuring tape in their pocket.
The best tape for this job is made by the Lufkin company, and we sell a ton of them with corporate logos imprinted on them in full color. So, treat yourself to the best; get a Lufkin pipe measuring tape.