Size: 9.1cm*2.3cm*2.3cm. Easy to store and carry during outdoor activities. Material: Made of durable PVC, high quality borosilicate glass, non-toxic sand and protective cover. Not easy to be broken, very safe for kids to use. These timers are also waterproof, perfect sand timers for kids or as kids teeth brushing timer. It will not break under normal usage conditions. Application: The timer Widely used on kids brushing teeth, exercising, time outs, reading, homework, promise of games to be played; Help your kids do things more efficiently and develop a strong sense of time; Ideal for cooking, meeting, tabata, classroom use, home, office, store decoration. Great Christmas gift for children, friends and teachers. Also a little promotional gift for customer. Package include:5pcs 3min sand timer (random color in yellow, green, blue, pink, orange). Note: Please allow 1-3 mm error/1-3g weight error and actual product color may vary due to lighting conditions.