Staedtler Ruler Combo 4 Pieces Drawing Set (Clear) Combination ruler 4 pieces drawing accessories set Ideal set for professional and school projects Set includes; Ruler 20cm/8 inch, Protractor 180 degree/9cm, 6 inch 30/60 degree triangle and a 3-1/2 inch 45 degree triangle All rulers are inches and centimeters Dimensions (WxLxH): Ruler 1x8-1/4x1/16 inches, Protractor 2.5x3-3/4x1/16 inches, 30/60 degree triangle 3-1/8x7-1/4x1/16 inches and 45 degree triangle 3-1/8x6-1/4x1/16 inches