have you ever checked out 'Confetti quilting' ? those scraps would be perfect for it- since you use tiny snippets then sew/quilt all over them. but to really answer your question---save them as small as you will use them- if they are smaller than you think you will ever use the put them into a ziplock & when it's full offer it to someone who would love to have them- there are lots of members here that will pay postage for your scraps- locally the school art departments, scouts, 4-H groups, and people who make pet beds for the humane society kennels all very much appreciate your scraps.