How to send cards in trading

[BlackJester]

Soaked in water for an hour, folded a couple of times and then wrapped around the leg of a carrier pigeon.  Albatross for bigger trades.

I don't trade much... 

[Poof]

I used to send in a bubble wrap envelope but once I started receiving cards in a regular envelope I just went that route theyve always arrived fine.  It's best not to use a hard plastic sleeve in an envelope if it's too thick the envelope gets snagged on the machine that process it.  I received one tore up and wide open but the cards were still in there.

[Sagemaster]

I use a regular envelope and hard cased so the cards don't bend. If I'm out of cases I stuff extras to provide protection for the card and use cardboard

[Thorn]

Give it to my little sister. "Deliver this!!!"
("And get me a snickers bar")