TAILHIGH Dog Hybrid Harness - Moss Green

Hello, Unfortunately the size is not good for my dog 😔 It’s a jack russle , I measured everything before purchasing and its too small. How can I change it to S ( instead of xs) What exactly I should do? Waiting for you replay and instructions for what exactly I should In order to change the size. Thank you in advance, Shay

Probably the best harness on the market, I shopped a little too much for my soon to be six month Aussie but he owns three harnesses and this is easily the best one. He doesn't seem to mind it either. While looking sleek and stylish.