High Quality Upgrade: The screen door has super magnetic force, automatically closes in one second without sound and closes tightly. The wide design and sturdy nylon thread make it have a stronger bearing capacity; environmentally friendly and beautiful, durable and wear-resistant, it can be used for years - anti-mosquito and insect repellent, pet and child friendly, it is ideal for courtyard, terrace, balcony, etc. Size Selection: The size includes the edging Velcro, not the door size. Measurement Method: First measure the inner width of the door frame, then add 5 cm on top as the product width; then measure the inner height, and add 4 cm on top. Buy a larger size instead of a smaller one, but the final size should not exceed the outer diameter of the door frame or it cannot be installed. Welcome to consult us Easy to Install and Remove: No drilling required, quick installation in minutes. The provided fastener is used for flat door frames of all materials and nails for uneven wooden door frames. The door curtain is easy to remove and will not leave any marks or damage to the door frame. Perfect Service: Since the product measurement is manual tile measurement, the size may have an error of 1-2 cm, which is normal. For any questions, please feel free to contact us at any time, we will definitely answer and solve it. The fine mesh blocks the invasion of all pests and protects you and your family at all times. Enlarged magnet, stronger suction The large magnet is wrapped in a silent fabric and closes quickly without noise. 4cm top design The top Velcro is widened to 4cm, more load-bearing. It will not fall off during use. Perfect workmanship, solid material The thickened coated edge fabric, super-strong Velcro, and high-quality bright silk material make the product more durable. The product size includes Velcro, and it must be larger than the door size. First, measure the width and height of the inner frame, then the width + 5 ~ 10 CM, the height + 4 ~ 10 CM. So that the Velcro can be installed on the door frame. The width of the left and right sides of the Velcro is 2 cm each, and the width of the upper Velcro is 4 cm. Please follow the principle: Larger than smaller. But the size cannot exceed the outer diameter of the door frame, otherwise the product cannot be stuck on the door frame.