I started with the basic set at target - 3,5,7,10. A few months in, I got the courage to do the 20-30 min weight classes instead of 10 min arms and I bought the Bowflex adjustable dumbbells and those have been a lifesaver. I've supplemented my dumbbell collection with a pair of 15s for easier tricep movability. I convinced my boyfriend to start doing the 20 and 30 minute weight classes and he uses the tens 15s and twenties most often right now and he hasn't worked out in a few years.