Leather Big O® Key Ring, PistachioLittle pOp of happy! Pistachio is a classic Oventure color with a smooth, coated texture [and a fun, contrasting trim]. The Original Big O Key Ring is a one size fits all bracelet key ring that can be worn on your forearm or above your elbow for hands free simplicity. The patented, signature locking clasp clicks open and closed so you can keep your keys, phone and wallet in one central, secure location.