This circular rug from scraps is the perfect stash buster. Moreover, since it's made of strands bound together, it's easy to expand as needed, just add more scraps. Therefore, the size is also quite arbitrary, and you can make it however you wish.
The full article about the pattern is available on Ravelry.
Granny's Scrappy Placemat
My Granny's series features one round granny squares. This makes it really great for using up those tiny bits of yarn in your stash. If you don't need a placemat, use it as a larger doily.
Funky Fun Circular Rug
So, this circular rug from scraps is a trip down hippy-trippy lane. Not only can it be a rug, but also a simple trivet - it only depends on how many yarns scraps you have.
Circular Coaster
Crochet this circular coaster using basic crochet stitches, worsted weight #3 yarn and a 4.50mm hook. They are ideal to practice your crochet skills with. Made in a variety of colors, they can be
Stash Baskets
This is a quick to crochet stash buster project for medium weight yarn. Crochet this small basket / container to store things like crochet hooks, pencils or pens. Perfect for managing your desk