Weigh the frame before you buy a hook

The first step is to know what you are hanging. A framed poster of Joan Miró is usually light, but the frame material changes the number more than the print does. A thin aluminium frame with a poster board insert often lands under two kilograms. A wood frame with glass can push past four kilograms once the backing is included. Put the framed piece on a bathroom scale if you have one. If you do not, estimate conservatively and round up. The fastener you choose should be rated for at least one and a half times the actual weight. That margin is what stops a hook from slipping its grip months later.

The wall matters as much as the frame. Standard drywall over wood studs holds a lightweight hook without help. Drywall over a masonry wall or a concrete block behind it will not hold a nail at all. Tap the wall. A hollow sound usually means the framing is behind the plaster, which is the easy case. A solid ring means you are dealing with a harder substrate and need a different fastener. If you are unsure, a small screw with a plastic anchor is the safer default because it spreads the load across a wider area of the board.

Match the fastener to the weight you measured

For a framed poster under two kilograms, a single nail driven at a slight upward angle is enough. Drive it deep enough that the head sits proud of the wall by a few millimetres. That small gap is what the hanging wire or tab rests on. A picture hook with a small nail is a cleaner option because the hook shape keeps the piece from sliding. Either way, the nail should enter the drywall at a right angle to the surface, not at a shallow skim. A shallow angle pulls the nail back out as the weight settles.

When the frame is heavier, between two and five kilograms, move to a screw and a wall anchor. A simple plastic expansion anchor is enough for that range and is easy to remove later with a small tool. Drill the hole to the size marked on the anchor, tap the anchor in until it sits flush, then drive the screw through the hanging hardware and into the anchor. Stop when the screw is firm. Over-tightening crushes the anchor and weakens the hold. If the frame is over five kilograms, use two fasteners spread across the width of the piece and check that the hanging wire is centred between them.

Level the piece and check the wall after a week

Once the fastener is in, hold the framed poster against the wall and mark the position with a pencil before you commit. A level placed on top of the frame tells you whether the mark is straight. If you are hanging from a wire, the mark should sit where the wire will rest, not where the top of the frame sits. That distinction is what keeps the piece from hanging crooked. Step back and look at it from the distance you will usually view it from. A small tilt that looks fine close up often reads as a mistake from across the room.

The wall will settle in the first few days, and a lightweight frame can shift slightly as the hanging hardware finds its position. Check the piece after a week and again after the first cold snap if the room temperature changes a lot. A tiny adjustment to the wire or the hook is normal. If the frame has moved more than a centimetre, the fastener may not have seated properly. In that case pull it out and start again with the next size up rather than adding more pressure to the same hole. A clean second attempt is better than a loose hold that fails later.

A framed poster of Joan Miró is a light object, and the hanging method should match that. The risk is not the print itself. It is choosing a fastener that looks right but is rated for less than the frame actually weighs. Measure first. Match the fastener to the number. Then hang the piece and leave it alone.