Depends what you want the roundels for.
If competition purposes, check the MSA Blue Book for the required sizes.
In respect of putting numbers on the roundels, don't do it! The scuffers don't like it unless they are taped through. Think the offence is 'Racing on the Public Highway'
Arwyn
Arwyn, you're right, some of the MTW racers had a ticking-off for not taping through the numbers as they left a circuit last year
