themselves classify this under their "Sew-on Stones" category. They have a center hole and is designed to be easily secured to garment, accessories, as decorations and for use in embroidery.
But in the general populace, they are as popularly used as beads in the form of spacer beads or by stacking various sizes of these to make fast but effective earring dangles.
As with all Swarovski crystal beads, the precision cuts and lead content guarantees you the best brilliance and amazing perfections. This is part of the Crystallized™ - Swarovski Elements.
#3700 comes in 5 main sizes at the moment but in a huge array of Swarovski colours.