here is the only one I've made that I might consider a crumb quilt, though for me, I would consider peices less than 1" as crumbs. Anything larger is just a regular scrap to me.
I had cut my scraps into strips and larger squares, and then used everything left over for this. I sewed smaller peices together to create bigger pieces, and then sewed them together until I had it large enough to trim to 8.5"