If you’re looking for a tiny car harness to help keep your petite dog safer while in a car, you may want to consider this. It’s not auto approved or crash tested, but constraining tiny dogs in cars is not easy and anything is better than using a collar while driving.
Petite-XS: 7″ to 10″ girth. 6″ to 8″ neck.
Petite-S: 10″ to 12″ girth. 8″ to 10″ neck.