Review on ⏳ Set of 12 Rhode Island Novelty 3.5 Inch Sand Timers for Perfect Time Management by Robert Petrig

Another poster is correct, these are inaccurate. But they are cheap and if you need about 2 minutes they will do. The fastest in my game was 1:40 and the slowest was 2:20. However, most of the herd was concentrated after about 2 minutes. If you just want a relatively short and consistent timekeeping device, they will work as long as you don't use them against each other. If you need accuracy, try a clock or digital timer. On the other hand, if you use them to play, it's easy to get confused with people who give one group 40 seconds more than another. It could be the balance.