To find wall studs, simply rap your knuckles along the wall until you feel and hear a solid backing. If you can't guarantee your findings, you may like to use an electronic stud finder that beeps or flashes when it passes over wall studs or ceiling joists (see Fig.1).
Wall studs are usually placed 400 or 600mm apart. If the best position for your painting isn't near the wall stud, you can choose to use a toggle, which once drilled and screwed in, it will expand and spread the pressure on your wall. Make sure to inform a Bunnings' Team Member the weight that you are planning to use for your toggle.
If your walls are brick, simply drill a hole with a masonry drill bit and then hammer in a plastic plug and insert the screw. Once you have decided if you need to use the wall stud to accommodate the paintings weight, now decided if the paintings will be suspended on a metal hook secured to the frame or from the paintings wire.