I like my one with 1/2" slots. I'm not sure I'd get my money's worth with a 2 1/2" slot. I have the 1/4", too, but find it a little busy. I fold my fabric again after pressing it so I'm working with a little over 10". I do not precut anything. I don't care if 5 yards is hanging off the cutting table as long as the fabric on the board and under the ruler is straight.