It was a little over 11X13X4, a double-layer chocolate mint with starlight mints crushed up between the layers, spangled with about 40 hershey kisses (dark, light, and "hugs")--it looked really nice! I'm quite pleased, I hope it tastes good--they're just starting to eat it now, I bet :)
I had a hershey "hug" slathered with home-made chocolate frosting, and Whines swore off sugar. Mmm. So much chocolate.
A small addendum--for the first time in my life, one of my cakes got finished off in a single evening :)