"The CryptoPunks are 24x24 pixel art images, generated algorithmically. Most are punky-looking guys and girls, but there are a few rarer types mixed in: Apes, Zombies and even the odd Alien."
"Every punk has their own profile page that shows their attributes as well as their ownership/for-sale status." By John Watkinson and Matt Hall. (Taken from: https://www.larvalabs.com/cryptopunks)