As said above, depending on what type of ground is being worked if you have a 100 yards of net a 50yd and 2 x 25yds would be more suitable. The type of ground I work is varied from large fields to sand dunes, so it pays to have different lengths of nets to try and cover as many bases as possible.
On a typical day doing tight hedgerows and large fields I would carry 2 x 50yds, 2 x 25yds and about 10 x 5yds. It does help if you know the ground that your working, as you should have an idea of where the rabbits will bolt too.
This is a typical day doing tight hedges and large fields where