It's size 11.7 and my front rotors are size 12.6 so it's smaller than real OEM rotors. The 2005-2010 model has 11.7 up front, so you should be fine. I had to do some research to find out what's going on here and it looks like EBC is an unupgraded company. If you have a Honda Odyssey after 2011 make sure you are the right size and the GD7328 is not yours so don't worry thanks.