VEVOR Hardware Cloth, 1/2 inch 24in x 25 ft 19 Gauge, Hot Dipped Galvanized Wire Mesh Roll, Chicken Wire Fencing, Wire Mesh for Rabbit Cages, Garden, Small Rodents

You can use either landscape staples or spikes, both will hold to ground. If your raised beds are wood boxes, you can mount to inside bottom of of the box with smaller staples

I used screws with fender washers