This is super super important. Always iron your shirt and fabric before you even start the crafting. Failure to do so will probably result in your letters not staying on, peeling off later or just wrinkled, none of which are good. So don't skip out on this step!
Take your transfer paper and lay the shiny side (folded up) face down. This is the part that you be ironing. Draw whatever you want on the paper.
Cut whatever you wrote/drew out and put it on the fabric. Make sure to put the side of the fabric you want showing down and iron on the back. Here I am working with the sequin fabric, so the pretty part is face down.
Once the letters are all on there, they should look like the picture below.
THE FINISHED PRODUCT!!
A little distorted because of my boobs, but the shirt isn't for me. Hahah. Anyway, make sure to turn the shirt inside out before washing it to make it last longer. I hope the craft worked out well for you, happy crafting!