After trying different harnesses on our dog, we decided to try the Perfect fit harness. The website is super easy to use in terms of getting the right combination, and if you have a cross breed dog, the company is very quick to reply to any requests for help in terms of getting the right fit. I ordered the combination advised - which arrived quickly - and I contacted the company, sending pictures of the harness on my dog. They gave quick and expert advice as to how to adjust it, which I did, and we now have a harness that is a 'perfect fit' I cannot recommend the company enough. They have fantastic customer service and the product is exactly as it is described.