Have you looked at the nylon mesh that you see in strainers?
Could be a good scale size although it may turn out expensive if you keep scrapping strainers.
Also, visit, or send a carefully briefed representative, to a fabric shop to look at a range of curtain nets.
Apparently they come in various mesh size/densities that could be useful. Come in nylon and cotton , senior management tell me so dye might work, otherwise, glue and paint?
Good luck.
Peter