Spring offers the Gymboree Mouse Plush Rattle in Tan for $2.50. Coupon code "SPRING10" cuts that to $2.25. With free shipping, that's $13 off and the best price we could find, outside of the mention below. It measures 5" x 5".
A close price: Gymboree has it for $2.50. Bag free shipping with coupon code "SPRINGTIME".