Pretty awesome reflective collars and matching leash.Available in 5 colours and against light they reflect a range of colours, even works against the sun. Xsmall: 1.7x 25-35cmSmall: 2.2x 27-34cmMedium: 2.7x 34-43cmLarge: 3.2x 43-53cmLeash xsmall/ small           Medium/large It also has a metal plate on both leash and collar so you can engrave your pets name or contact no. Great product for night walkers Also available in the same style leash and harness