I have this one which I use on leg days, or before and after running. Its a 26 inch one which you can work both legs at the same time, as well as your back and shoulders. I also have a smaller roller that has handles on each end to target calves, etc when tight. I've used them since 2014 and the quality is good and it holds up. Seems to make a big difference in recovering quicker and not being sore. It takes a couple of weeks to get used to since the rubber is hard, but your body adapts to the pressure and its almost as good as a getting a hard massage.