Cats use their long facial whiskers to measure gaps. They use them to find out whether they fit through an opening or are too big or fat for it. The older a cat is, the longer its whiskers, as it becomes less mobile with age Fun fact Cats can turn their ears independently. Item number: 13836 Dimensions: 2.6 x 0.7 x 2.2 inch(W x D x H) Suitable from 3 yrs+