This set comes with 1x two minute hourglass sand timer to make it easier for your whole family to stay focused when brushing their teeth. Each timer is approximately 10cm tall x 2.5cm wide Dentist recommended: Good way to promote dental hygiene. The little tooth hourglasses work great as brushing timers , they make teeth brushing time more fun and more productive, Flip and Watch Design – Designed to be easier to use even for toddlers, our well-balanced hourglass with enhanced stability lets kids flip it over to reuse the timer. Bright, Colourful Sand – Inside each timer you will find colours that boys and girls will love using, ranging from a vibrant blue, radiant yellow, and classic red. (note each timer colour is selected at random) Made with kinds in mind, these sand timers are durable with double layer prodection. Inner glass and outer durable PVC. The double layer design make them safe for use. Note: The sand timers are not precision timing device, please allow time deviations(±10%).