Measure the width where you will be mounting the gate: whether that be the opening itself, if you will mount the gate in the opening, or the width to the mounting point if you are mounting it on the face of the opening. Compare the width you need with the width options of each product and select the one that has a range that best fits your required width. Measure the height of your opening. If you want the gate to fill the opening, select the gate with the collapsed height just a little shorter than your opening. If you don’t need the gate to fill the height of the opening or the height is more than 10 feet, select a standard height.