Mini mesh, also known as chain link mini mesh, is a type of chain link fabric that has a much smaller mesh aperture, which makes it much harder to climb or cut, thereby increasing the security of the fence.
Mini mesh requires a lot more metal wire to manufacture than typical chain link mesh products, which means it's not only stronger than ordinary chain link, it's also considerably more expensive. This type of mesh also usually requires a much stronger fence structure, because of the weight of the mesh.
Like many chain link fence products that are heavier and harder to work with, mini mesh chain link is often sold in smaller rolls, which weigh less and are easier to work with during installation.
Not every chain link manufacturer can make chain link mini mesh, and they don't all make the same sizes, so you might have to search a little more to find this product in your area.