A couple week ago, I almost throw away these static grass paper mat as I thought I would never need them, Games-workshop cloth static grass matts are much better.
Measured out the area I needed (77cm x 45cm), then cut it out.
Then I marked out a grid using a green maker pen (squares are 29 x 29mm).
My first attempt I tryed to draw the black crosses without marking a grid and it was a nightmare!
I then drew the pitch marking in a red marker pen.
Then I trimmed the edges off to make it look a little neater.
Finished! and Im really happy with the results.
But if you buy Games-Workshops cloth static grass matt (and you needed a lot) you could make 6 for £2.50 each.