Mesh

[Siikibam]

My husband and our brother-in-law are building the piggies a hutch. I’m wondering where I could get mesh for the doors? Because otherwise they’re going to be using the one on the run!

 

[Swissgreys]

I imagine most large hardware type stores would sell mesh for animal pens - maybe try googling what you have in your local area.
Just make sure you don't use anything too flimsy like chicken wire, which can be easily bitten through by a determined fox or marten.

 

[Siikibam]

My husband said the same with regards the chicken wire. I’ll look at the websites and see when I can pop in.