Seashells are symbolic of life, death, and rebirth.  They bring in the element of water which can be combined with the element of fire, if they are used for smudging(with sage, the Kapachi Incense, or charcoal dics with resins).  These deep shells are also perfect for holding smaller items and crystals.
 
Sizes vary but they are approximately 2.75" X 2.5 x 1".
 
Available: 2, 3, 4, 5, and 6.  Price is per shell.