Features: This productivity timer is versatile for various occasions, such as daily cooking, games, exercise, yoga, sport, housework, homework and so on, helping you stay focused for longer. The sand inside the hourglass game timer is versatile in different colors, such as white, black, yellow, purple, blue, green and so on, representing the different times of the year, so that you can easily identify it when you use it. Specifications: Material: plastic, borosilicate glass and sand Color: bright colors Size: about 1.93 x 3.74 inches, and 2.13 x 4.72 inches Package includes: 9 x Classroom sand timer Notes: Please allow slight deviation due to manual measurement. Please allow slight color difference due to different monitors. Under adult supervision when little child under 3 years old use the timers. Please don't use anything to scratch the words on the glass to prevent the words drop off.