I square mine off after they are cut from a project, measure it and label it and put it in a basket until needed for small projects or added to a piece that is bit short in another project. By the way, I buy yardage of nylon tricot iron-on interfacing and make my own tape for joining batting. Saves lots of money and takes very little time. One yard of the tricot (60 inches wide) cut in 1.5 inch strips will make 40 yards of fusible tape. I wrap the strips around the core from packing tape or duct tape.