That 10cm margin of error is the lines touching, as the lines are each 5cm thick.

But the Eredivisie works with umpire's call, so in Liverpool's case they still would not have got a penalty on Van Dijk and the Mane decision is extremely borderline for the overturn. pic.twitter.com/ZPA5QDHUb0

— Dale Johnson (@DaleJohnsonESPN) October 19, 2020