Prevue Pet Products Beach Walks are constructed of 100% natural ground seashell which provide calcium to birds as they chew. The telescoping diameter provides great foot exercise and the shell pieces provide texture to groom beaks and nails. Prevue Pet Products Beach Walk/X-Small measures 4-3/8in Long with a 1/2in to 3/4in diameter. This Product/Package Measures: 0.80 in. L x5.50 in W x3.50 in D