I followed the sizing as shown in the page and got a S for my 14lb terrier poodle mix and it fits her perfectly.
Very easy to put it on and take it off of her, and looks like the harness is just as comfortable for her as the leash is comfortable for me to hold and keep control of her.
It looks very well made, all the way down to perfect stitching. Price was excellent compared to what they sell harness and leashes at the specialty stores around me. Very pleased with this purchase and I would recommend it!
This item was received at no cost in exchange for my honest, unbiased review. All opinions expressed here are my own and based on my own experience with this product.