Funny.. I am looking to buy it I have the charm pack so I went on this morning and did a search and yours came up.. I want to make it for my 3 year olds room... I chatted with the ladys and they recommended a 10 inch border on top and a 21 inch on the sides.... do you know what you did... Not sure if I wanted to do 2 layer cake packs as I have 2 charm backs to make it bigger or the larger boarder... Love the boarder it just makes it pop out!