Flexible type for soft puppies. Even if your dog eats the crumbs while playing, it will be excreted if the size is smaller than the size of rice grain. When you play with your dog, be sure to be the owners side. ■ Size (with key and ring) Xsmall 13x6cm small 18x7cm Medium 19x9cm Country of Origin: United States *Because it is imported overseas, there may be scratches, dents or tears on the package. We appreciate your understanding.