9x13 yellow cake marbled with green. I covered it in buttercream and used decorator cream cheese that I had left over from a previous cake (already colored). I found that it doesn't cling to the butter cream very well though. One thing I would do different is the tip size for the lines. I used #5 and when I went to put the numbers in I didn't have enough space. Next time I will use #3 and put the numbers in with #1.