I use pencil boxes too. One holds the attachments to my small Janome machine that I take to SitNSews...a small scissors, spool of thread, seam ripper, etc all fit in it as well. I also use them for collections of sewn mini HST's..tape a label on them and I know what's size is in them. And yes scrappingfaye58 they stack so well! Also picked up a bigger style (about the size of two pencil boxes) for .50 this fall for larger pieces I use in my mini quilts.