small fabric pieces lift from garment factory, any idea about what to do with them for commercial use ?

Answer 1

If they're mostly cottons, they can be bundled by color or print styles and sold to crafters who quilt.

Regular crafters are always looking for some good purchase, you'd need to be affordable, and have the fabrics somehow identified by batch so people could order them.

Putting notice up on the barter and trade bulletin boards can move a lot of it for you.

Dollmakers are always looking for something new and unusual also.

Answer 2

You can make a quilt and sell it.