Size Diameter: (Approx.) Small size: 7.1*7.9 inches; Large size 10.2*11 inches. Perfect size suitable for various patterns. ^Double-sided: Elegant appearance, follows a simple style, fresh and natural without losing color, giving you a unique artistic experience and making you feel particularly calm and relaxed. ^High Quality: High-transparency glass, as clear as a crystal, allows you to enjoy the beauty of the quicksand. Carefully screened sand, colorful, clearly defined layers, and the flowing 3D effect pattern is excellent. ^Applicable: Moving sand pictures create a new sand image with each turn. Watching the constantly changing flow of sand helps relieve stress and effectively reduces eye fatigue, making it especially suitable for office workers, students, and those who spend long hours working at a computer. NOTE: As the light and screens are different, there is a slight difference in color. ^Creative Gift: Mobile sand is an exquisite piece of art that you can use to decorate your home or office. If you're struggling to find the perfect gift for yourself, your friends, or family, consider purchasing one of these sand art pictures to enjoy!