15 grams of Miyuki 4x3.4mm drop beads, which is over 280 beads. 

The exact amount will vary by specific bead finish and material as it affects the weight. The beads are made of glass. The width and length of the bead is 3.4mm by 4mm with a .8mm hole.

Drop seed beads, made by Miyuki of Japan are made with precision with color finishes to match the popular delica seed beads, tila beads, triangles, and more. They are shaped like raindrops or teardrops and are famous for their uniform shape and high quality craftsmanship. They are offered in a wide range of beautiful colors often have a complimentary color match in other shapes and sizes.

Drop beads have a variety of uses. They are ideal for creating fringe and texture in a design, and can add a beautiful accent to earrings, bracelets, or necklaces.