The Tartan plaid is a fabric that is under a hard clear plastic dome with size approximately at ½" x 5/8". I believe these were made in the British Isles. I bought them at a antique fair in Scotland. Colors of plaid are red, green and white. Could be worn by both female and male on French cuff shirts.
All my cufflinks and jewelry are sold in used, pre-owned condition. Vintage and Antique items by nature have some wear, imperfections and signs of use and age.
Plaid Tartan Silver Toned Cuff Links Cufflinks