We ordered this for Salem, but it is too small. I got it on clearance so I can't return it. The site I ordered it from said the medium would fit a border collie so we thought that would be the right size but he should have had a large. It would probably fit a cocker spaniel sized dog perfectly.
If anyone wants to get a costume for next year PM me and I will send it to you.
This isn't the site I ordered from, but it shows a picture of the costume.
http://www.buycostumes.com/Category/0/Product/21566/ProductDetail.aspx