Today I made a large pincushion that you can wear around your wrist. The base is not a bottle cap, it is the lid to a jar (about 3" wide). I did all the same things that I did with the bottle cap pincushions but with 2 exceptions.
For the cushion, I cut out a 6 inch circle instead of a 3 inch one.
Rule of thumb, add 2 to 3 inches to the size of the base for the cushion.
I sewed on the elastic wristband before sewing the base to the side. I also did the embroidery on the sides before sewing the cushion on.
Now it is ready to hold a lot of pins to use while working on your next sewing project.