A fob, as on the White Rabbit
$5.75 These are great to go with a matching purse,... [DOC] [TLE] Disney Couture Alice In Wonderland White Rabbit Fob Watch Locket ... [PAR] Disney Couture Alice In Wonderland White Rabbit Fob Watch Locket (28" + 3" 
extender): Amazon.co.uk: Jewellery.