One for the boys! My son's best friend will be 12 on Thursday. He's very sporty so his card had to have a sports theme; I've had this Paper Nation decoupage in my stash for a long time. I saw a 6" square stepper card online & came up with a template to recreate the same thing in metric (I can't work in imperial!) I hope you find it useful.
Paper Nation decoupage & backing paper, matted onto DCWV shimmer cardstock, sentiment generated in Craft Artist Professional.