These are often used in jewelry display but can also be used as small mirror inserts.
These came to me from another artist and I don't know where they bought them. So I'd recommend either sealing them with a spray on mirror sealant or using mirror mastic as an adhesive if applying it to the backing as is.
These are available in a variety of shapes:
- Square-4" x 4" or 3" x 3" with beveled edges
- Oval-6" x 4" with beveled edges
- Octahonal-5.5" x 5.5" or 4.25" x 4.25" with pencil edging