There are 52 cards in the whole set. Print them on card stock and laminate them, and maybe even make some extra sets! I have 3 personally.
Each letter of the alphabet has 2 cards that begin with the corresponding sound. Included in the download is a key showing which pictures match together, for quick organization.
Use them however you like! I used them a lot in the my reading groups and in literacy centers (remember, if they're laminted.. the kids can write on them with dry erase marker!).