There are 50 exercises in total! Each card shows an exercise in three difficulty levels to accommodate different abilities (beginner, intermediate, advanced).
Promising review: "I'd highly recommend this and all FitDeck products! We generally work out for an hour at a time — start with a one- to two-mile run, then do a handful of FitDeck cards, then about 10 minutes of stretching. The hour goes by really fast. By shuffling the cards and drawing them in random order, you get something different for each workout, which keeps it from getting boring. Since I have to look at a card every minute or so, it also keeps me mentally engaged, so I don't zone out. We usually didn't work out when we traveled, but now we take the bodyweight FitDeck with us so we make it a point to at least squeeze in a light workout. We love it!" —S. Berg
Get them from Amazon for $14.39 (available in five styles). Another option here.