These cute pewter tags for dog collars are made in the USA by Big Paw Designs. They include ring attachments and can be placed on keychains as well.

Sizes:
Rub My Tummy: 3/4" round
Tricks for Bones: 7/8" square
Rescued Bone: 3/4" round
Precious Heart: 3/4"
Diva Heart: 5/8" L x 1/2" W