The hourglass represents the cyclical nature of time, with the sand flowing continuously from one bulb to another & then reset by flipping the device. This cyclical flow can symbolize the repetitive nature of life, cycles of the seasons, & the ongoing passage of time. in essence, the hourglass is more than just a timekeeping device; it is a symbol of the relentless march of time & a reminder of the preciousness of each moment. Its enduring presence in both historical contexts & contemporary settings highlights its significance as a timeless icon. 15 Minutes: Height 30 cm / 11.8 in, Width 11.5 cm / 4.5 in 30 Minutes: Height 30 cm / 11.8 in, Width 11.5 cm / 4.5 in 60 Minutes: Height 30 cm / 11.8 in, Width 11.5 cm / 4.5 in /Production time & delivery time/: Production time is 3-7 working days. If you need expedited production for special circumstances, please let me know in advance. Buyers in the British Isles will receive it within 2-4 working days after delivery, & 3-7 days in other regions. Very few remote areas will take more than 15 days. If you have special requirements, such as expedited transportation, I can charge additional logistics fees for expedited transportation for you. European Retro Rotating Metal Hourglass - 15/30/60 Minutes Sand Clock Timer Timeless Home Decor Anniversary Gift For Him