Here's what other sites are saying:
The basic Blue Poly 20 x 16 ft. tarp is great for around camp, a tent fly, a boat cover, storage cover or a woodpile cover. Aluminum eyelets every 3 ft. provide attachment points for rigging it up as a canopy or for securing it down. All sides are heat sealed for greater durability; edges are reinforced with polyethylene rope in hem. Woven, laminated polyethylene is tough, waterproof and mildew- and rot-resistant.
REI Blue Poly Tarp 12'x10'
REI Blue Poly Tarp 14'x12'
REI Camp Tarp 12
REI Camp Tarp 16
$100 - $130
Eagles Nest Outfitters ProFly Rain Tarp
$72 - $99
Black Diamond Mega Light
Eagles Nest Outfitters HouseFly Rain Tarp