i consider a scrap what ever is left when i am finished with my quilt- unless i purchased extra yardage.
sometimes my scraps are foldable- sometimes they are small corners / squares/strips- sometimes i cut my scraps into the largest piece i can get out of them- sometimes the piece gets tossed into my (applique) tote
sometimes they get tossed into a drawer for my granddaughter's to play in when they come to visit- sometimes they go into a flat rate box for me to send on to someone else when it's full. there's always a use for them regardless of size- decide what works for you & pass on the rest- there's always someone somewhere wishing for scraps in all different sizes.