I would say my 6x24 is my fave ~ I can cut/measure anything within my "normal realm" with that... Have two, cannot live without it. Also love love love my 36" I finally invested in, as I cut a lot of fleece, and its 60"W so the 24" had to be moved and drove me nuts. Get lots of use from my square set (6.5 & 4.5 mostly) ~ for trimming blocks after embroidering them