Prevue Hendryx Birdie Decor Window Box Bird Toy Transform your bird cage into a comfortable and fun home for your bird May also be used as a bird feeder or waterer Made from 100-percent safe, non-toxic fd&c colors and materials Easily connects to any cage with wire spacing between 3/8" - 3/4" 2 1/2-inch long, 2 1/4-inch wide, 2 1/2-inch high