We'll send as many as you can use, free of charge.
Actual size 4 x 6 inches (10 x 15 cm)
Up to 50 cards go by first class mail for 10 cents each, including postage and printing.
$4 per 100 for larger quantities, including standard shipping.
For priority mail, add $4 postage for up to 250 cards, $8 postage for up to 800 cards.