I purchased a red tag for my girl and a blue tag for my boy. We chose the large bone shape surrounded by Swarofski Crystals, as my pups are also large. They are SO beautiful! I thought I would like them but I, in fact, adore them! My pups are SO excited to proudly wear their new bling. I don't keep their collars on while they are in the house because they love to wrestle but they do wear them everyday to go for walks. The crystals remain in place. They do not seem to scratch or wear easily. These are the best tags I have ever purchased.