Auction Power Guide

I am new to selling on ebay.
There is a section where it says "Shipping Destination Service."
The item I am selling is a simple trading card, which I will be sending in a regular, letter-sized envelope, that I just put stamps on and just put in the mailbox and let it be picked up.
So, which shipping service am I supposed to select?

You can ship any way you want. For something that small I would use the US postal service. Put a stamp or two on it, and have it insured, and then mail it. The insurance will be based on the value of the card, but it’s never that much. Good luck.