Six sand timers: Orange: 30 seconds Red: 1 minute Green: 2 minutes Pink: 3 minutes Yellow: 4 minutes Blue: 5 minutes * The timers for the minutes are the same colors as the corresponding colors of the the Montessori short colored bead stairs. * The times are not marked on these timers (but stickers are provided if you want to mark the approximate time on each sandtimer, but please make a note of the colors/ approx. times above) * The time is reasonably accurate, but the nature of the product means they are not absolutely exact. * Dimensions: each timer is approx. 3.5" (9cm) tall