Gauge vs millimeters: reading thickness specs correctly
Steel thickness gets described two ways, and the two don't always agree. Gauge is an older, inverse system: the higher the number, the thinner the sheet. Millimeters are absolute. When someone tells you a panel is "14 gauge," they mean roughly 2mm. When they say "18 gauge," they mean roughly 1.2mm. The gap between those two numbers is the gap between something that stays flat on your wall for decades and something that ripples the moment you hang it.
We work in millimeters because millimeters don't lie. Our panels are cut from low-carbon steel, S235 or equivalent, at a fixed 2mm. Not "about 2mm." Not "2mm-ish depending on supply." Two millimeters, cut to order, every time.
Why does this matter to you? Because a story cut in steel is only as permanent as the sheet it lives on. The photo you want to keep, the summit you climbed, the drawing your child made — these deserve a substrate that behaves. Thickness is where behaviour is decided.
How thickness affects flatness, warping and panel size limits
Thin steel wants to move. A 1mm sheet the size of a dinner tray will bow under its own weight, flex when you touch it, and telegraph every imperfection in your wall behind it. The larger the panel, the worse it gets. Physics is unkind to thin metal spread wide.
At 2mm, the equation changes. The sheet holds its own plane. It resists the slow warp that ruins cheaper pieces over years of temperature swings. It stays true across the sizes people actually want on a wall — up to and beyond 60cm without visible deflection. This is the quiet reason 2mm feels premium in the hand: it doesn't apologise for its own size.
There is also a limit at the fine end. Steel at 2mm needs a minimum line width of around 3mm, because anything thinner than that will bend or tear during handling. Every detail on the panel — every branch, every whisker, every letter — has to physically connect to the rest, because the panel is a single continuous piece of metal. Thickness sets the floor for how delicate the design can go. 2mm gives us enough rigidity to keep fine work intact without forcing the drawing to become chunky.
Mounting and wall-load implications of 1mm, 2mm and 3mm sheets
Weight scales with thickness, and so does how you hang it. A 2mm panel at size M — around 60cm — weighs roughly 2kg. That is light enough for standard wall plugs into plasterboard with anchors, and solid enough to feel like it belongs there.
We mount on standoffs: small spacers that lift the panel off the wall so it floats, and casts a shadow. That shadow is not an accident — it's a designed element, a second drawing made of light. Standard standoffs are widely available (packs of twelve, around four per panel), and mounting holes are generated automatically when we prepare each design for cutting. If you prefer the panel flush against the wall, that's an option too — no shadow, just steel.
- 1mm: too light and too flexible; standoffs can dimple the sheet, and large formats sag.
- 2mm: the sweet spot — rigid enough for standoffs and shadow-mounting, light enough for standard fixings.
- 3mm: heavier, needs stronger anchors, and rarely adds anything visible for interior wall art.
When thinner or thicker steel is the right choice
2mm is our standard because it's the right answer for almost every wall. But it isn't the only answer that exists.
Thinner steel earns its place in very small pieces, in signage that will be laminated or backed, or where weight is the overriding constraint. For a standalone panel meant to last, thinner is a compromise you'll feel every time you look at it.
Thicker steel — 3mm and up — belongs outdoors at scale, in structural or sculptural work, or where a heavy edge is part of the intent. For weathering steel that develops its own protective patina, thickness buys years against the elements. But for a piece hanging in a living room, 3mm mostly buys you a heavier panel and a harder day mounting it.
So we settled on 2mm and stopped negotiating. It's the thickness where the steel disappears and the story stays. One day the file will be gone from a hard drive somewhere. The panel won't. That's the whole point — something that remains, long after the moment that made it.
