My Mk. III has a spinnaker pole 2 1/2 inches in diam.
The pole length should 11.75 feet ( "J" dimension) so, to conform to Class and/or handicap system rules, you would have to shorten the pole that's available to you--probably not a big deal . (There is no restriction, that I'm aware of, as to pole diam.)
Clare Jordan. Aragorn