Forget glass slipper
Adult XL 12x12
Sublimation has to be done on at least a 65% polyester shirt. The more polyester in the shirt, the brighter the colors.
You need a heat press. Can NOT be done with an iron.
Place shirt on heat press and put a piece of copy paper in between the shirt. Lay transfer down on shirt where you want it and then lay another piece of copy paper on top. Do NOT use a Teflon sheet it hold moisture.
Temp needs to be at 385 for 75 seconds with light/med pressure