I've roll printed copper sheeting with a basket weave design. Cut and formed with hammers to curve.
To wear: arrange your scarf or shawl, use the point of the pin to pull some of the wool through the hole and slide the pin through the wool to secure.
I've sealed the copper with a micro-crystalline wax polish but like most copper items, it will develop a patina over time. To clean, use any polish for copper/sterling metals or the polishing cloths that are safe for these metals.
1 1/2" wide/long. Pin is 2 3/4"