These vases are very simple yet very beautiful. They are made from a single cut piece of bamboo that is lightly finished on the outside with a protective varnish. The inside of the vase is unfinished- making these ideal for brush and pencil storage but not for use as a water vase. Since these are made from all natural bamboo stalks please allow for some variation in size. The medium vase is approximately 8 inches tall and has an opening with a 2-3/8 inch diameter meter.