I bought both the small and large shade sail. The large shade would have been enough for our approx 30 foot by 40 foot yard. We will overlap the two sails to allow sunlight to still warm the area a bit and not cover everything in shade as we like to garden. The material is more durable than I anticipated and provides great shade. It also can be wiped down easily. The grommets are well done. I only wished it came with hanging materials or at least a suggestion on what is best to hang it with.