|I cut out my patterns in the kitchen so I've always used food cans as pattern weights - grabbing a can of garbanzos, tomato soup or tomato paste. But then I have to reassemble the cans back into the cabinet. It made the table look as if I was both cooking and sewing. Organza here, can of olives there.
Now I've switched to a set of ceramic tiles known as subway tiles. They're 3 " x 6", weigh about 4 oz,white, and stack neatly. I was able to buy less than a case at a ceramic tile place, so I bought 15 for under $10. (Sorry, don't have a photo, so google "subway tile" on images if you're unfamiliar with these.)
They fit in many spots, even narrow sleeve pieces. If I think I need more weight, I stack them. They're cheap and make a neat stack on top of the microwave, ready for another pattern cut-out project.