I bought a 20 x 20 ruler to use when cutting blocks over 6 in. My ususal cutting ruler is 6 x 15. The larger size works really well. It may seem expensive but use your Joann's coupon. It is well worth the money!

Thanks, think I'll spring for the biggest one I can find at Joann's (with a coupon, of course). :)

20 1/2" Creative Grids Square. Was a gift from the ladies in a workshop I taught. I love it!!!!

12 1/2" but would like to get 16 1/2" and a 24"

I have 16 1/2 in. ruler and do not regret buying it

Me too, 12 1/2", love it. You can never have too many rulers.

20" ALSO HAVE 12" - 9" - 6" -4" (I think its 4") Love my square up rulers.

I have the omnigrid 20 1/2" square ruler and it has come in handy so many times when squaring up blocks.

I have never used a square ruler to square up my blocks. Could someone please post a tute on how to do this method.

24" ~ I love it