What size garden storage box do you need?
Start with the contents, not the plot. Pile up the cushions, tools or small pieces you want to store, then look for a box that will take them without a struggle. Leave a little spare room so the lid can close cleanly and you can get things out again.
A compact box suits a small patio and a modest stack of cushions. A larger box is the better fit when you also store throws, watering cans or a folded side table. Measure the footprint on the ground as well, including the space the lid needs to open. If the box will sit against a wall or under a window, make sure the lid can still lift or fold back.
Think about daily use, not only how much it holds. If you will open the box every time you sit out, keep it close to the furniture it serves. If it will hold tools, put it on a firm, level patch you can reach from the back door.
If you need to move the box to sweep or mow, look for handles or wheels, and think about how heavy it will be once it is full. A box that is awkward to shift will stay where you first put it, even if that spot is not ideal.
Our garden storage boxes run from compact patio models to larger outdoor boxes. They also sit in our wider garden storage range, if you are still deciding what kind of outdoor storage you need.