While searching the web I came across a pin the candle on the cupcake, can you say perfect. Well except the price. Sorry I loved it but I wasn't spending $20 on it (I know I am cheap). I have tons of felt left over why not put it to good use.
It measures about 22x24", its not too big, I made 12 candles with velco on the back so they would stick.
I free handed the cupcake and sewed it using a zig zap stich. The sprinkles are just floss I hand stiched.
If you are not interested in making your own you can purchase it on Amazon.
Have fun--and good luck getting it on the top!