MagnaKoys 1/2 oz (4 dram) Cobalt Blue Vials w/Straight Black Bulb Eye Glass Droppers for Essential Oils & Liquids (5) Cobalt Blue Vial Size: 3.62 Tall x 0.88 inch Volume Size: 0.50 oz - 4 Dram - 15 Ml Cap Finish: 18/400 Boston Round MPCH Dropper: Black 2 7/16 inch Glass Pipette