Get perfect alignment on your TShirts. Simply guide the ruler up to the collar of the shirt to center your design before pressing. You will get a precisely aligned design every time. T-Shirt alignment tool is 12" wide and 5" tall to fit most sized shirts and designs. Made of high grade crystal clear cast acrylic that is laser cut and etched for years of durability (no cheap plastic here!). It will come with a paper mask that will need to be removed on arrival. The aim is to prevent scratching through the shipping process.