What Supplies Do You Use?
Address Labels (Avery 5160 and 8460) 1" x 2 5/8" OR HANDWRITTEN
You will need 4 per request, If you will not be hand writing your "To" and "From" addresses on both envelopes. If you don't think you need four address labels, read this article on where lost mail ends up if it is not deliverable.
Outer Envelopes The envelope addressed to the player.
Staples Brand 6" x 9" Gummed Closure Envelopes (472852/19306)
Inner Envelopes The envelope addressed to you is the Self-Addressed, Stamped Envelope (SASE), and should have the appropriate postage on it.
Staples Brand (Greeting Card Envelopes) 5-3/4" x 8-3/4" Pull & Seal (473955)
I personally use a large Ivory Envelope which stands out from the rest of the mail I receive, and my eyes still light up whenever I see one waiting for me!
Paper To write the request.
Staples Brand 8.5" x 11" 20 lb Multiuse Paper (135855)
Item To Be Signed The easiest item would be a trading card, but I will go into more detail on alternate items to send TTM.
Postage Stamps You will need two stamps.
I recommend using:
1 x $0.41 stamp (current postage rate) for the request to the player (Outer Envelope).
1 x Forever Stamp (current postage rate) for the return envelope (Inner Envelope).
The forever stamp is guaranteed even with future postage increases.
If you need more understanding. Watch this Video.