Default Box of Sim cards?

Hey sorry if this isn't the best place for this thread, wasn't sure where to go.

Does anyone know if it's possible to get more than one Sim card(ATT) from anywhere? I can go to the local store and ask for a new one but I was hoping to get several from somewhere. I change between 2 phones with different size Sims so it would just be nice...

Thanks!

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