These Swarovski crystal hearts have two holes, one on each side of the heart for easy sew down application. They are 12mm  x 12mm (1/2" x 1/2") (measured at the high point of each heart) and are light siam. They are sold individually. Sew down crystals like these are often used in beaded earrings.

Swarovski 12mm Hearts Light Siam

$3.00Price