10 minutes, 20 minutes, or even 15 minutes. The smaller timer is a bit more expensive, the timer that is a bit less (ten minutes) is a bit cheaper, and the 15-minute one is a bit more expensive, and the 20-minute one is more expensive. The one with more timer is a bit more expensive, for calculating study time.
Decoration: Looks wonderful as an aesthetic decoration on a study or office table.
Exercise or Meditation: Great for timing short workouts, planks, or meditation.
Gift: A very popular and sweet gift item to give to kids or friends!