This is a molded resin seashell from England.
The remaining pincushions are unknown in composition, but it is probably also resin. This one looks like a cowboy boot's detail, but it's more a cut-off boot. And of course, I haven't figured out how to make them play nice together. They should be side-by-side. Obviously, that ain't going to happen! But I wanted to show 2 views so you could see the pincushion on all sides. I've been successful in lining some of them up, but I have no idea how I did it. And they down-loaded so closely together that they won't let me comment between the images. Ah, well! I'll comment here. The next shoe is a Carnaby Street-style (or also a turn-of-the 20th century model). I owned a pair of shoes with a slightly lower heel "during the day" and quite striking I was with my textured stockings!
The next pair (red/black/yellow) looks like a mod dream. After that comes a pair I think of as Edwardian or Victorian. Then comes the giraffe. The last three pair strike me as mid-20th century America culture. I like looking at all of these, but realize that I should share them with others since I own a retail store!