For a mechanic's 50th birthday. 5 is carved from a 7" round and a 6" square, using nefgaby's number cutting chart. ( here's the link) http://www.cakecentral.com/cake-photo_1111573.html . Thank you to nefgaby for sharing. I'm sure I'll be using it again in the future. The tire is a 10" round. Carrot cake with cream cheese filling. All fondant. Gumpaste and fondant accents airbrushed with silver. Thanks for looking!!