1 inch big holes mesh,sturdy wire to fence out dogs, cats, doves, fancy pigeons or larger animals like grown rabbits, mammals goats, full grown chickens, older birds or ducks, cantankerous geese off garden raised beds and keep larger critters like groundhog, mink, possum, raccoon, gophers, moles, porcupine, fisher, foxes out of existing wood board fence in chicken area or raised garden beds.