Mr Boris and I are delighted with his new Perfect Fit harness. It fits perfectly and looks attractive too. Mr. Boris is golden so the orange and black looks complementary LOL ! He is 9 and and 36 kg and strong !!!! He has always enjoyed long runs with my son in the country and so has never been used to "lead walks" Well he is already making great progress and the harness has given me the confidence to take him out and keep us both safe. I can see that he finds the harness comfortable and I can relax too. Thank you for the help in choosing the appropriate size it is indeed perfect . I can confidently recommend Perfect Fit. I have used these for my previous dogs Ruby and Honey and again just perfect. I certainly am a very happy customer.