This sand timer can be freestanding. Most of the hourglasses can be freestanding. The dimension is Dia10*24.5cm, and it is a large size one. Maximum time is 1 hour, and the minimum time can be 5 minutes, or even shorter. From the images, you can see the sand timer are in different colors. And you can not be sure which is the difference, the sand or the bulbs. The fact is, the bulbs are the same, only the colors of the sands are different, and you can customize different sand colors. For more sand timers, you can check the hourglass page.