A pair of colorful, enamel mobile earrings by Eve Kaplin, each with a rabbit, and numbers 4, 7, and 8; about 2-3/4" long x 2" wide; posts for pierced ears; fine condition. 

Since the number 7 is hanging from the rabbit, it's possible that the design references "A Dark Rabbit has Seven Lives," a light novel series by Takaya Kagami; please let me know if you are familiar with the stories and can shed more light on this idea.