This 60-degree diamond ruler is designed to cut diamonds that finish from 28cm to 15cm tall. Features-coordinates with both the Fons and porter triangle ruler and hexagon ruler (not included), this ruler does all the math for you, easy-to-understand directions printed on the ruler and easy-to-understand instructions with photos and ideas for combining 60-degree diamonds and related shapes are enclosed. Ruler is clear acrylic with black and yellow markings. Ruler measures-13x 7-1.3cm x 0.3cm . Made in USA.