A reed fence roll can easily be cut to size. Shortening a reed fence roll in height can be done with clippers or hedge shears. Cut the reed at the desired height, and place the reed fence roll in the desired spot.
It is also easy to adjust the width. Choose the right size and add 3 reeds to it. Cut the iron wires from top to bottom and remove the last three stems. This leaves you with a few centimeters of iron wire which can be easily twisted together again so that the reed fence roll remains firmly attached to each other.