What Are Snap Frames? A1 to A4 Sizes and How They Work

Retail fixtures · Updated 27 July 2026 · 6 min read

How do snap frames work?

A snap frame works on four hinged aluminium sides. Each side pulls outward on a spring hinge, opening the front of the frame. You lift out the clear cover sheet, swap the poster behind it, lay the cover back down and press each side shut. The frame never leaves the wall, and no tools are needed.

Inside the frame there is a solid backing board, your poster, and a thin clear sheet over the top that protects the print from dust and fingers. The clear sheet is usually PVC rather than glass, so it will not shatter if a frame takes a knock in a busy shop.

Opening the sides is quick. Start with the top edge, then the bottom, then the two long sides, and the whole face lifts away. Closing works in reverse. Most people manage a poster change in under a minute, standing on the spot, with the frame still screwed to the wall.

What snap frame sizes are there?

Snap frames follow the standard A paper sizes, from A4 at the small end up to A0 at the large end. A4 and A3 suit counters, doors and shelf ends. A2 works for in-store promotions. A1 is the usual shop window and pavement size. A0 is for large frontages and wide corridors.

Pick the size to match the reading distance, not the wall. A poster read from a metre away can be small. A poster meant to stop someone on the footpath needs to be big enough to read while they walk past.

A1 is the size most Irish shops buy first. It reads from across a footpath, it fits a standard window bay, and it is the same size that most pavement signs take. That last point matters, because an A1 poster printed for the window can move outside to the A-board when the promotion changes.

Where should you put snap frames in your shop?

Put snap frames where people already look. The window facing the footpath, the wall behind the till while people queue, the entrance door at eye level, and the end of an aisle. One well-placed A1 frame in the window does more work than four small frames scattered around the shop floor.

• Shop window. Your highest-traffic surface. Use A1 or A0 and keep the message short.
• Queue wall. People waiting to pay will read anything you put in front of them.
• Entrance door. A3 or A4 at eye level for opening hours and current offers.
• Aisle ends. A2 frames to flag a deal at the point people are deciding.
• Outside. A1 in a pavement stand to catch people walking by.

Outside display is its own job. A wall frame will not survive Irish weather, so use a proper pavement unit instead. That is covered in pavement and A-board signs for shops and cafes.

What should you check before buying a snap frame?

Check four things. The profile width, meaning how thick the aluminium edge looks. The corner style, either mitred for a clean look or rounded for safety. Whether it is wall-mounted or freestanding. And whether the frame is rated for outdoor use if it is going anywhere the rain reaches.

Wider profiles look sturdier and hold larger posters flat. Narrow profiles look neater on a small A4 or A3 frame. Mitred corners give a sharp, square finish that suits a smart retail front. Rounded corners are kinder in tight spaces and around children.

Also think about how the frame fixes to the wall. Most come with pre-drilled holes and screws. If you rent your unit and cannot drill, look at freestanding stands instead, which give you the same fast poster change without touching the wall.

Are snap frames better than posters stuck to the window?

Tape and blu-tack look temporary, and they leave marks. A framed poster reads as a shop that is looked after. The frame also keeps the print flat and clean, so a poster lasts through several runs instead of curling after a week. Since the frame stays put, the cost is spread across every poster you ever put in it.

The trade-off is the upfront spend and the fixed size. Once you own A1 frames, you print A1 posters. Most shops find that helpful, because it forces one clear message per frame rather than a window covered in mismatched notices.

Snap frames handle the polished printed message. For prices at the shelf edge, see shelf-edge labels: sizes, holders and how to print them. For the wider picture of what a shop front needs, start with the pillar guide on shop display and signage, and check wet floor signs and safety cones for the safety side.