Originally Posted by QuiltedAngel
Quilt in a day has a half square triangle ruler, actually they have 2 a 6 1/2 and a 9 1/2 inch... It is worth a shot, she also has videos on her site and vimeo :) <3
I like the Quilt in a Day ruler because you square them up before you press them open.
I also have the June Taylor ruler, and love it for drawing the lines.