San Diego Sail Shades 18' x 14' Rectangle (Sandy Beach) - Heavy Duty Commercial Grade 205gsm Shade Sail Whats included: 18'x14' Rectangle Shade Sail and includes the tension mounted steel D-rings which are double stitched into the corners, sail shade is measured from D ring to D ring. 4' of weather-resistant polypropelene rope for each corner which you can use for mounting. Best in class Heavy duty PE - 205gsm - compare to other manufacturers who use 140gsm. This is twice a strong and durable. Block 92% of UV. Is porous, so allows air to flow freely and keep the area cooler under these shades. **(Please note all sail shade edges do curve inwards for aesthetics and durability and are measured from D ring, to D ring.)**