Your pro shop operator should have your bowling specs on file. If you decide to purchase a new bowling ball, they do not have to fit you again. So if they have your specs on file, why shouldn’t you. bowlingball.com now gives you the ability to store your specs in your account.
Most bowlers do not know their specs. This isn’t necessarily a bad thing, but it sure can’t hurt for you to have. I have heard many stories over the years of pro shop owners just closing up shop, or airlines losing bowling balls on the way to a tournament out of city or state. Fitting is not a science, it is more of an art. If you have a great fit already, then you really don’t want to change it.
Your bowling specs include your span (distance from thumb to fingers), hole pitches (the angle the holes are drilled in the ball), hole sizes (the diameter of the holes being drilled), and much more.