When training your dog to fetch and retrieve, you may need to build up their strength. With the new Mikki Dumbbell you can provide your dog with a plastic toy to suit their size and ability. The Mikki Dumbbells are available in 5 different sizes, ranging from 10cm in length to 18cm. As your dog improves in ability you can upgrade to a larger dumbbell for them to master before setting them real, working tasks. Size: 16cm