I made two of these in a class, and used fabric glue to hold a few scraps in place and then sewed them down before I glued more down. I did glue/sew onto the wrong side of the shirt so that the inside of my jacket was smooth, not fuzzy. Collar stayed on until jacket was complete, then cut off and binding sewn around the whole jacket. Fabric cuffs were sewn on so they could be folded up.