Generally speaking, I think anything smaller than 1-1.5" wide is too small to really be useful.

Gosh, I used to cut up my scraps into my lumber yard....1 x 4, 4 x 4, 2 x 4, etc.
Never failed when I found a project pieces were just out of size so I still put them in large bins and when I see someone needs scraps, I send them a box. And I use them myself for scrappy quilts and such.
I do however, keep 1.5" x wof and 2.5".
Gylene Fitzgerald has awesome pineapple templates and polygon plates for that size.
And 2.5 " well, we know there's always jelly roll quilts to do.
Like everyone's reasoning here.

I've been putting mine in a bag as is & I'm always going through it looking for just a little piece of this or that & I usually find something I can use! I have lots of fun going through that bag of brightly colored scraps & I'm very protective of them. Almost as protective of them as my stash!! LOL! :-)

I don't cut them up, just sort by color. If I cut them, then they may be the wrong size! I like to do paper piece as well as a variety of piece work.

Oh is this so true -- I gave away a 1/2 yard of focus fabric because I could not find the coordinating fabrics. You guessed it, when cleaning my sewing room I found the coordinating fabrics but now I have no focus fabric (sigh).

I cut a lot of my scraps and created a monster!!! On the other hand, this winter when I need to make a quilt quilt, it will be neat to have alot cut! I cut 10" blocks, 3"x6" blocks, 5",4", 3" blocks. Anything smaller than that I cut a thimble blocks.

If you've got enough space in your sewing room to keep your scraps, don't throw anything away!!! Anything can be used for something along the way and scrap quilts are beautiful. I even use "crumbs".... sew them all together in any way that takes your fancy and then cut them back into 4 1/2" squares, sew them together either with or without sashing. Good luck!!!

I pitch all of mine into a container and do not cut them until I decide to do a project.

Thanks for all the input. I think I will be cutting them for scrap quilts. If they are already cut I can just grab some and sew the 4 or 9 patches when I'm in he mood for some less complicated piecing.

Elfi, your crumb quilts are beautiful. I've been saving my crumbs but haven't tried one, yet. Thanks for the inspiration!