Using these curtains is easy. Just hang them up in your window to decorate your room and block sunlight. When it's time to wash them, remember to separate them into dark and light color batches. Use a gentle machine wash cycle with cold water (no more than 30°C). Don't worry about the ±3 cm size error; it won't stop the curtains from fitting well. Each set has two panels, so you can easily dress up your window. Also, keep in mind that the color on your screen might be a bit different from the real product because of monitor differences.