So much fun--so much MMF and RKs!! 12x18 (stacked to be 9x12 for rear to windshield, hood is rounded pyrex had to further shape with extra fondant. The roof portion is RK as are the quarter panels. This cake was so big, i had lots of help from my kids and husband. The bday boys loved it, a hit:) which makes the 20 hours worth it;)