I LOVE these! They have the look of brads, but without the bulk. They're the size of the larger 1/4" brads (not mini-brads), perfect for flower centers, accents, etc. I purchased the foam squares, too, but I think you could use any small foam squares or dots as long as they're at least 1-2 mm thick.
The colors are nice and vibrant, with a pearlized finish, and you get a LOT of these in a package. These are perfect when you want the look of brads, but in a more easily mailable form.