Minx,,since the netting is 2",,it's easy to count the number of squares between the poles,multiply this by 2" and that tells you how many inches of netting there is between the posts.Posts 10ft apart is a total of 120". 60 squares of netting properly stretched will equal 120". If you have 50 squares between 10' of span,it's stretched too tight,,if you have 70 squares between a 10' span it's too loose.