We are selling our dog stuff, hardly used this cool 'Aqua" harness is suitable for a medium sized dog. Note, this harness does not have a lead. We bought the No.6 size for our Labradoodle (2nd generation), sizing; Chest Size 55-60 cm., Weight 10 - 18 kg

Following text is from the English WebSite:

Easy Walk V Dog Harness Discover ultimate comfort and safety for your pup with the easy walk V style harness from Hugo & Hudson! Featuring branded detailing, this soft yet secure harness helps prevent pulling while reducing pressure on your dog's neck. Machine-washable fabric, you'll be sure to get noticed on your daily walk in vibrant style. First two images taken from the manufacturers website.