I was a looking for a nice dog harness since my cocker spaniel like to run a lot and damage her neck when she pull forward, I did a little research and this was the best dog harness that I found, in their website (look in google for "Dean & Tyler All Weather Dog Harness") you will find the measures for every size. For spaniels is recommend the small size (which is not that small anyway) and it perfectly fit after adjustments.
* Very well made.
* Good price.
* Perfectly fit.
* Cool looking.
* Happy Dog.
* If your dog is behind you and you want to pull it forward, if you are not careful and if it not well adjust
the dog can free itself from the harness (a little bit difficult but it happens the first time when I was
trying on my dog, after adjustment and been careful to pull forward that wasn't an issue anymore).
Don't get disappoint for the minus I put, trust me this is a great product that you and your dog will love it.
One final advise make sure you check the size of your dog, since this "small" harness" might be to big for dogs smaller than a spaniel (mine has 2 1/2 years so shes is an adult).