>>45513706You find a piece of cardboard, or cut it, to fit bigger than a Pokémon card, and then place that card, or two, in sleeves, place that on the cardboard and tape them on the cardboard, like on or two pieces. You can either place that by itself in a letter envelope, if they’re cheap, if they’re expensive you should place another piece of cardboard carefully on the cards and then wrap that with bubble wrap carefully, and then you can place that in a package or small box.
I’ve sent tons of cards with just, 1 piece of cardboard, placed a card in a sleeve, taped that on the cardboard, fit the cardboard in the letter and then off it goes. I place a 2nd sleeve on top of the card if I’m not using tracking so it’s safer than having it exposed to scratches.