Well, you've got me scratching my head. Back 100 years ago, the Japanese arts weren't so rigidly systematized, sooo....
I figured that exact dimensions would give a match. Inexact dimensions? Not sure what that means. Reminds me of an aikido teacher who gave a jo (4' staff) seminar. He insisted that the proper height was the height of your heart. My 4' stick was a bit too short, and I noticed it when spinning the stick.
I still need to see a good match from Oceania, though.
F