The playful guy...river otter necklace, Lontra canadensis, This sculpted Pewter River Otter Pin is expertly crafted into wearable Wildlife art, sure to please the gracefully swimming semi aquatic mammal enthusiast. Pin is converted to a pendant. .9" wide X .9" tall. (2.2 cm x 2,2 cm). 18 inch (45 cm) silver tone chain 2 inch (5 cm) extender chain Adjustable to 20 inches (51 cm). Secured with a lobster claw clasp chain.