This monogram is originally from a hand-embroidered antique handkerchief, circa 1920. 

Monogram: MSR

Accents/Accessories: 20 inch small rolo chain; Attached bails; Textured background; Six small silver accent balls

Size: 53 x 29 millimeters (2.09 x 1.14 inches)

Weight: 26 grams (0.92 ounces)