Roll the mesh out on the ground; the driveway is best. Use a tape measure to measure 5 feet of mesh. Use bolts cutters to cut down to the 5-foot mark, making sure to leave sharp wire fingers.
Pull the length of mesh away from the cage. Cut the frame railing off the bottom of the mesh to make spikes that will stick into the ground.
Use pliers to curl the fingers down the vertical side of the mesh into hooks. Stand on the mesh and pull the framed side of the mesh toward the fingers. Use the pliers to crimp the top hook to the top of the frame railing. Crimp each finger from top to bottom.
Roll and push the oblong cage on concrete until you form a cylindrical hoop. Wear gloves. Use a metal file to file any sharp edges on the vertical fingers.
Place a tomato plant on the ground in a pot or in the ground. Stick the spikes of the cages into the ground, crowning the tomato plant.