Square Me Up Ruler
A fast, fun way to make half square triangles. Uses popular10in and 5in squares of fabric to give you quick andaccurate half-square triangles in 4-1/2in (4in finishedsize) and 2in (1-1/2in finished size). Also a great tool forsquaring up other blocks. 7-1/2in x 7-1/2in square