I have two Olipfa rulers - a 24" and a 36" (found the 36" on Amazon.com), both of which I use often. Then there are my "squaring up" rulers, which are very handy. Then I have a few . . . oh, can't think of what they're called - they're the ones with parallel slots, for cutting strips! June Tailor something-or-others? Then there's a set of hexagons and triangles . . . and several smaller rulers, for measuring seams. Then there's a big, square ruler thing, with rulers and angles. Do I need them all? Probably not . . . but I do use them all!
You probably won't know exactly what you need, until you need it. I do lots of crafts, so that figures into my need for multiple rulers. That's my story, anyway.
