Slightly Risque Birthday Cards, 36 Cards & 36 Envelopes, (Bulk Packaging). Funny (adult) Birthday Card Set Made in the USA on Recycled Paper Funny Birthday Cards - 72 piece set with 36 cards and 36 envelopes Thick stock, colorful designs, high quality birthday card set 3 each of 12 birthday cards featuring humorous designs Artwork by various artists with funny sayings on each card Have your loved ones, colleagues, family and friends laughing