I'm going to try a frozen buttercream transfer for the first time for my daughter's birthday. Does it matter what size tip I use? I did a practice with a #5, but found it hard to get some of the detail. I'm either going to do Caillou or pinkalicious. Any other tips for me?

I usually use tip 3 for the outlining. If I need to have some details I will use a 1 or 2. For fill in I will use anything from a 5 to a 12 depending on what I am doing.