I am kinda new to quilting and was wondering......what is the best way to cut a large peice of fabric into say, 4 in. squares? I seem to handle smaller peices fine but usually i take a large one and fold it over and over until its a managable size. This never seems to work out. The peice is never square and somtimes so thick a rotary cutter doesn't go through it very well. Any ideas? thanks.

Tina