I have the Wilton King sized cupcake pan. I think there are 4 sizes--mini, standard, jumbo, and king sized. I have the largest size. The cupcakes are about 3 inches wide at the top and probably 4 1/2 to 5 inches tall with frosting. I'm having trouble finding cupcake boxes for them. I was able to fit a dozen in a 14 x 11 (quarter sheet--that might not be the exact size, can't remember) cake box, but they were a bit wobbly. I'd like to find the cupcake inserts for the king sized, but I'm only seeing jumbo sized. They won't work b/c those boxes are only 4 inches tall. Any suggestions on where to buy online?
Maybe try a 10x10x5 and use a cake board as a base. You can put a dab of frosting on the cake board to hold them in place better. HTH!
These are my 2 favorite places for most sized boxes. Plastic Container City and Big River Box Company.