As far as the OP, I guess if I noticed the numbers were significantly different than what they usually are, I might mention it, but I've never seen anything remotely close. This sounds like something the school should be taking up with their uniform providers before they order. I know the rules state exact specifications, but I've never heard of anyone having a problem with the size of their numbers in my area.
As far as the sidebar conversation, I never carry a gauge, but do take a needle along. You can almost always take a little air out of the ball.
