My Yorkshire Terrier, Jasper, I was suffering from extremely tight shoulders. My friend, Mel Merritt from Canine Major Essex Clinical Canine Massage, suggested I try this company. The website is very helpful and caters for the inexperienced shopper 😂 It told me what measurements to take, l loaded them into their site and bingo my harness was with me within two days. The accompanying guide showed me how to fit it and it was a perfect fit (forgive the pun). How walks have been so much nicer and it's great to see the improvement in Jasper. Yes, they are not cheap but my fur baby is worth every penny. Thank you, Mel and PerfectFit