UPDATE

I set the text a bit bigger so it prints better

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Dog ID tag, just as simple as that. This is the model in Tinkercad for you to duplicate and edit it, just click on both texts and change it to whatever you want:

https://www.tinkercad.com/things/kut0AWueTfT?sharecode=BSFuGUtafUAhMJeBqboiZqdv2y25wAM9F5gr51BEiKk