We were really impressed with the quality and adjustable size. We were concerned that the X-XL would be too large for our Kelpie but after careful adjustment, it fits her perfectly. It is helpful to be able to warn other dog walkers of Poppy’s anxious demeanour. As a rescue working dog she is very wary of other dogs, particularly those larger than her. This harness is perfect for Poppy while she works on her confidence.