1.Place your back heels against a wall
2.Place a spirit level across you hands with your forearms bent at 90 degrees until level
3.Measure from the back of your heel to the underside of your elbow (whilst wearing the appropriate survey footwear i.e Wellies)
4.Input the measurement in centimeters to the nearest millimeter
5.Click on your most common survey style to see suggested anode length
6.Please contact us after placing an order and quote the lengths relevant to your staff as given by this calculator