These tarps range in color from blue (which is least expensive) to green and silver. They come in sizes from 5′ x 7′ all the way up to 50′ x 100′. The color dictates the quality of the tarp. The blue is thin and will last up to 1 to 2 years outside. The green and silver are much heavier duty and will last up to 5 to 7 years outside, even in the harshest of weather conditions.