Ground walnut shells are a go-to filler for hobbyists who want their pin cushions full and their pins holding firm. This 1lb. bag from Martin Tree Farms is built for exactly that kind of project, and customers say it delivers reliable results from one pin cushion to the next.
Many buyers report that pins set well once the cushion is filled, which is the outcome most crafters are after. One reviewer who had been filling Homemade Pincushions with rice said this option works better. Another noted that the fine grind of the shells suits pin cushion filling nicely.