We have a field that is laid out as in the image attached.

The problems with width can be minimised if you paint a white line down the centre. Our pilots all now look for the centre line and there is no need for such a wide runway.

For the length- the pilot always land close to themselves so if the pilots box is close to the start of the runway it makes for a shorter runway. If the pilots box is in the centre almost half odf the runway is not used