the famous...how small is too small topic...
first off---what will you use? not a lot of point saving anything too small for you to use---if you never use anything smaller than a charm square-anything smaller is just taking up space- if you are an appliquer & use tiny pieces in your creations...well- tiny is not too small.
that being said---in my book it's never ok to send your scraps to a landfill! there is always someone out there who would love to have what you have no use for. there are members here on the board who use small scraps- there are people who use the really small pieces to stuff pet beds--and other uses- there are preschools & elementary schools that would love to use some scraps- there are scout troups...the list goes on & on- someone will want/use what you have no use for. so= decide=what will you use at some point- if you will not use it box it up in a flat rate box & offer it- or donate it- check with the local guild, senior center, care facility, scout group, lqs, here on the board---pass them on-