This is soooo cute! It is a little "jyubako" (box) filled with New Year's food such as:"ikura" (the little orange eggs in the citrus cup), "onigiri" (rice ball), carrots cut like plum blossoms, "edamame" (soy beans in the pod) and "goma tofu" (sesame tofu).
It is on a silver tone adjustable band that will fit most ring sizes. It measures about 2.5 cm wide (1 inch) and 2 cm high (.8 inches).
http://www.etsy.com/view_listing.php?listing_id=20923914