I like a lot of my rulers. For squaring up, I use the 6.5" and 12.5" more than the others I have. The 4.5" is just too small for me. I can't seem to keep it straight. It slips badly. If I am cutting strips, I have a 6x18, 6x12 and a 3x24 that I use. I like rulers! And I have a lot of specialty rulers that I almost never use, but every once in a while I will go looking for them.