Just shy of 3' in diameter. The thickness of the outside rim can be adjusted by using extra lines included on the full size pattern.

TRY TRANSFER PAPER -- SAVE YOUR PATTERNS!
Transfers patterns to wood quick-and-easy, saving your plans from being cut up and ruined. . .4'x 8' coverage,
Just $8.99!
Read more about Transfer Paper here -- it's totally re-useable!