Make perfect half triangle squares and quarter triangle squares in sizes up to 23cm - 1.3cm with the help of this ruler.It's made of heavy gauge acrylic and features 0.3cm ; 0.6cm ; 1.3cm ; and 2.5cm lines; a 45 degree line; and is laser precise.This package contains one 9- 1/2 by 23cm - 1.3cm ruler.Made in USA.