1. These hourglasses are designed for daily use and are not precise timekeeping instruments, so slight time deviations may occur. There may be a time and size deviation of up to 5%, as speed and humidity can affect the flow rate of the sand. 2. 15 minute/30 minute size: 8.5 x 8.5 x 20.5 cm; 45 minute/60 minute size: 9.5 x 9.5 x 24.5 cm. Weight: 500 grams. Material: wood, glass, and sand. 3. Placing the hourglass on a table adds a stylish touch, with its exquisite design and vibrant colors, making it for home or family use. It also serves as an elegant office display or home decor, simple yet beautiful. 4. Applications: Valentine's Day gifts, birthday gifts, cooking, play or practice timing, bedroom or office desk decor, crafts, home decoration, classroom, table decor, dining room, family living room, Christmas and Year holidays, coffee table, bookshelf. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.