The place I bought it from is no longer in business, but I think it was around $35.00. Joey's about 5 pounds 10 ounces and wears the 3, there's plenty of room in it and he can wear it over a thick hoodie. Here' s a size chart that seems accurate:
http://lib.store.yahoo.net/lib/yhst-...zingchart2.gif.
Some people have recommended this site.
Buddy Belt Leather Dog Harness in Black at Metropawlis Pet Boutique – Unique Products for the Uncommon Pet - Strollers, Carriers, Toys, Collars, Leads, Beds