Hexagon Half Size Templates. 1.5", 2.5", 3.5" - Clear 1/8" Markings are laser engraved for long lasting use. Set does have seam allowance and guideline holes Measurements are from top to bottom from the seam allowance lines. Overall sizes from corner to corner are 2", 3", 4" Matches up with our Equilateral Triangle Set # 635189702645 1/8" Thick Acrylic