10 5/8" length, 3mm diameter * Cut on ultra sharp blades which allows scent to flow easily * 3mm diameter allows maximum wicking of scent * Place as many Diffuser Reeds in a jar of reed diffuser oil as you"d like. We find that 3-5 works just fine, but many people add more (8,10,12+). Know that the more reeds you use, the more fragrance is released, and the quicker the liquid is used up.