Be carefull what you say Derek, there are a few in here that was brought up on imperial measurements.
It would have been easier to stay on it as well.
Heard my grandson say he kicked the ball and run at it from 10 feet away and it went right up to the 6yard line..... 
But I hate to say it, Grump is right, most of the manufacturers make them for the USA market so that the size they use.
Demand dictates..