The crystals: 5 cm x 0.5-1 cm.
The jewelery should not be exposed to water, as this reduces the lifespan of the jewellery. If you want to cleanse the jewelry, it can be done with intention, and with incense such as palo santo, sage or common incense, or by placing the jewelry in sunshine or moonlight.
The chains are handmade and all crystals are unique. Therefore, no chains are exactly the same or 'perfect', just like no crystals are out in nature.