I use silica sand (tiny glass beads) available at most craft stores and I make their own cloth cover using 400 count cotton, and use my pretty material for the outer cover.(therefore 2 layers of material..add a couple of tabs and attach a small bag for scraps and thread scraps....they are very quick to make...the pin cushion is 3" x 3" and 2" high, remember to leave a hole in one corner to pour in the silica sand - using a funnel - then sew closed. they also act as a weight and stay put on the edge of your sewing table, ironing board or wherever. I have tried to enclose a picture of the last ones I made....
For the bag opening I go to walmart and pick up the heavy plastic carton ties - they use in shipping, and just make a pocket around the top and slip it in and it will expand and stay expanded for you, and the whole thing can be washed.
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