To be honest, I was a bit skeptical before I ordered this hoodie for my 6 month old French Bulldog (6,5kg), because I could not imagine, as in the price of good quality to be offered. But: I'm thrilled! Both the fit, and the processing are super! He is nice cuddly and my little Frenchie like wearing it. And he even looks super cool so from :)
Have the sweater in XL ordered because I wanted to fit longer and he currently sits still very loose, so I think he will certainly fit a few more weeks (ie until 8kg he should definitely fit).