Even if the harness fits properly, the fabric is so smooth that it comes out of place just with the lead hanging down on the side of the dog. This is such a big problem that I can`t use it. The harness is very small, I recon size medium will fit my chihuahua who weighs 2 kg even better. The colour on he harness is mutch darker brown in real life than on the picture. Plus for reflector.