The size of run you need depends on how many chickens you have, what chickens you have (breed/size/personality), and how much they are allowed to roam free outside the run. Always aim to give your chickens as much space as you can, either by letting them free range in the garden or backyard or by getting a bigger Walk in run attached to the run of your coop. If you're not able to extend further, try moving the coop and run as often as possible or changing the soil or wood chips regularly. If you're having difficulty deciding what run size to get, feel free to contact our customer service team who will be happy to help!