I make fabric post cards that are 4x6 and
the clear plastic sleeves I buy are PERFECT
for mail the cards.
You have to buy 500 at a time, but if you can
get 4 other friends to go in with you than approx.
$5 per person is about all it costs.
Click on the link below to see the item. Let me
know if the link does not work.
http://www.uniquepacking.com/product...40315d1adaae77