CHENGYIDA 50-PACK, Squeaker Stuffies , Small 1"(25mm), Dog Toy Replacement Squeakers Pack of 50 small pet replacement squeakers Dimensions: 25mm/1" diameter Great for do-it-yourself new toy projects Make old toys squeak like new Place a few squeakers inside an old sock or a few layers of socks to make more difficult depending on dog size, tie a knot at the top of the sock. Add an extra treat inside to make more rewarding.