These small, screw top, 1/2 dram glass vials are 1 1/2" tall x 7/16" in diameter & the opening of the mouth is approx.  3/16". Fill these with tiny treasures, glue the lid shut, attach a small screw eye or wrap the lid in copper tape & add solder for interest, then tie a ribbon to it to attach to altered books, shrines or jewelry.