Tree / Plant Guards (Portobello EH15)

Good day, Thank you for reading, I am looking for any suitable material to make into tree and plant guards. Primarily for visual protection, to avoid the plants/trees being damaged, but it has to have 'safe' edges (nothing sharp or dangerous), or edges that can be made safe, thank you. Anything similar to the items in the photo are welcome, regardless of condition or age. And this would also include real Tree Guards, of any condition, as well as chicken/mesh wire which can be purposed into guards. Minimum height around 20cm, no maximum height. I have around 20m in area to protect. If possible, please send a photo of anything you may have that would be suitable. Thank you very much.