A part of the North American mammals series for the 'Making Tracks' hard enamel pin series first found on Kickstarter, this North American River Otter hard enamel pin swims about playfully in the river! 2.75" tall Nickel Black Finish Backer Card Double Rubber or Butterfly Clutch (Your choice!) Rubber Clutches: Good for hats, clothes, or any time a metal back might irritate your skin. Butterfly Metal Clutches: Good for bags, collars, and pin boards. Locking Clutch: Good for that extra piece of mind that your pin is locked in place! Perfect for places where a pin might take some extra hits in your travels!