Anti-Pull Mesh Harness, Size Small (8"-14"), Black, For Heavy to Moderate Pullers

What is the tightener clasp like? Does it have a little button type thing that you press down on to open or is it the type you push in from two sides

I have a jrt with a 13' neck and 22" girth around chest. looks like he's right in between small and medium. suggestions?

How and where do you measure your dog for this harness?

This item is 9.99 at Walmart why is it double the price here ?