I think a 12" would be too much, but I'm not sure a 10" will be enough.
If it is a 2 layer cake, Wilton shows 38 servings....so yes it is a good choice. Same chart shows 56 for the 12"
Thank you. I can't find my cake serving chart.
The 10" is 30 servings in my book. I posted some photos of servings on different sized cakes in my gallery if you want to take a look. I know people use various charts but I took these measurements with my own pans so this is what I go by.
Hope that helps!