【𝗠𝗘𝗔𝗦𝗨𝗥𝗘𝗠𝗘𝗡𝗧】: Measurement is taken from corner to corner, crafting slightly curved edges based on precise calculations. This design helps the Shade Sail to be tight and neat after installation, preventing any mid-sagging for optimal appearance and performance. Feel free to contact us for a custom order if you prefer straight edges. 【𝗗𝗨𝗥𝗔𝗕𝗟𝗘 𝗠𝗔𝗧𝗘𝗥𝗜𝗔𝗟】: Our Shade Sail is 100% crafted from 200 GSM HDPE (High-Density Polyethylene). Its woven knitted design is breathable, preventing water pooling and strong wind. Blocks up to 95% of harmful UV rays, our Shade Sails come with a 3-year warranty against UV degradation. Built to endure sun exposure, it resists UV and fading while providing a noticeable temperature reduction of up to 15 degrees compared to unshaded areas. 【𝗦𝗧𝗔𝗜𝗡𝗟𝗘𝗦𝗦 𝗗-𝗥𝗜𝗡𝗚𝗦 & 𝗥𝗢𝗕𝗨𝗦𝗧 𝗘𝗗𝗚𝗘𝗦】: The edges feature robust double-layer stitching to prevent fraying and maintain the Shade Sail's form. Stainless steel D-Rings are affixed to each corner for effortless installation, while all corners are constructed with extra stitching to maximize the strength of D-rings. 【𝗜𝗡𝗦𝗧𝗔𝗟𝗟𝗔𝗧𝗜𝗢𝗡】: (1) Estimate your desired shaded area. (2) Choose from triangle, square, or rectangle shapes based on pole quantity. Attach using Hardware Kits to roofs, trees, or concrete walls. (3) For cable wire connection, maintain a 0.5 - 2 ft gap between D-Rings and poles. For optimal performance, we would suggest pairing this product with our Shade Sail Hardware Kit. (Hardware kit not included) 【𝗖𝗨𝗦𝗧𝗢𝗠 𝗦𝗜𝗭𝗘𝗦 & 𝗪𝗔𝗥𝗥𝗔𝗡𝗧𝗬】: Our Custom-Size orders come with hassle-free 30-day returns and a 3-year limited product warranty. For optimal results, pair with our hardware, backed by our confidence as the manufacturer. Your satisfaction is our commitment!