70×100 is where two things change at once. The coloured frames stop — from here up the choice is oak or black — and the weight becomes something you have to plan for rather than notice afterwards. Both changes have the same underlying cause: area. A 70×100 is twice the area of a 50×70, and everything about handling and appearance follows from that.
Where the colours end
White, dark brown, blue, green, red, yellow and pink are made up to and including 50×70. At 70×100 and 100×140 the range is oak and black, and that is the end of it rather than a gap waiting to be filled.
There is a design reason to be at peace with this. The moulding is the same width at every size, so as the picture grows, the border becomes a smaller and smaller fraction of what you see.
| Format | Area | Frame as a share of the object | Colours available |
|---|---|---|---|
| 21×30 | 0.06 m² | substantial — a real border | all nine finishes |
| 30×42 | 0.13 m² | noticeable | all nine finishes |
| 50×70 | 0.35 m² | a fine line | all nine finishes |
| 70×100 | 0.70 m² | an edge | oak, black |
| 100×140 | 1.40 m² | barely present | oak, black |
At 0.70 m² a coloured frame would be a thin ring of pink or green around a very large image — assertive enough to notice, too thin to look intentional. The finishes that do exist at this size are shown across the frame range.
Oak or black at this size
The general rule is that oak suits warm and photographic subjects and black suits graphic ones, but scale tilts it. At 70×100 a black surround adds visual weight to something already large, so images that would take black at 50×70 often want oak once enlarged. Two working defaults:
- Oak for landscape, botanical, abstract washes, warm-toned photography, and anything hung in a room with a lot of white — it stops the frame becoming the strongest line on the wall.
- Black for typographic prints, flat-colour graphics, black-and-white photography, and any print hung on a dark or strongly coloured wall, where oak would glow as a bright rectangle.
One case overrides both: if a 70×100 is going next to smaller frames, match the finish of the smaller ones rather than choosing on its own merits. The large frame becomes the anchor and the wall needs to read as a set — the arrangements that work are in the gallery wall guide.
Solid oak frame 21x30 cm
Black wooden frame 50x70 cm
Black wooden frame 30x42 cm
Black wooden frame 21x30 cm
Solid oak frame 30x42 cm
Solid oak frame 50x70 cm
Weight, and what actually holds it
Glazing weight scales with area, so the glass in a 70×100 is twice that of a 50×70 and half that of a 100×140. The consequences are practical rather than dramatic.
| Task | 50×70 | 70×100 |
|---|---|---|
| Hanging | one person | two people: one lifts, one guides |
| Fixings | one | two, level, about 35 cm apart |
| Plasterboard | a plug will do | a rated cavity anchor, or find the stud |
| Brick or concrete | drill and plug | drill and plug, both points |
| Adhesive strips | marginal | no |
Two fixings rather than one is the single most useful habit at this size. It halves the load per anchor and stops a wide frame drifting out of level. The only accessory we make is a single wall hook, in the accessories; heavier anchors come from a hardware shop, and it is worth checking the frame's stated weight against the anchor's rating rather than guessing.
The wall it needs
Hung portrait with its centre at the standard 145 cm, a 70×100 runs from 95 cm to 195 cm — comfortable under a 240 cm ceiling, tight under 230. Allow about 30 cm of clear wall on each side, so 130 cm of uninterrupted plaster for a portrait piece. And allow distance: a print this size wants about a metre and a half between you and the wall, which rules out most hallways. The height standard and its exceptions are in the hanging height guide, and the room that usually has the depth for it is the living room.