Donut.A curve without beginning.
- Pietro Giglio

- Apr 24
- 2 min read
A sofa that refuses corners, edges and conventions — and finds in its closed form its most complete freedom.

There is a moment in the design process when a form stops being a proposal and becomes an inevitability. With Donut, that moment came early — the instant the perimeter line closed upon itself, forming the continuous ring of cognac leather that gives the piece its name. Not an arbitrary choice: a geometric necessity.
The sofa was born from a rejection of the conventional sofa. No straight backrest, no orthogonal armrests, no lines that interrupt the visual flow. Donut is a torus section — the most mathematically democratic shape, because it has no front or back, no privileged seat and no imposed orientation. Whoever sits is at the centre.
"I wanted a sofa that embraces without gripping. The curve does everything — nothing else is needed."
THE CONTINUOUS CURVE
The outer profile of Donut traces an uninterrupted arc from the base to the highest point of the backrest in a single sculptural gesture. This continuity is not merely aesthetic: it distributes tension evenly across the internal structure, eliminating the localised stress points that in traditional seating correspond to angular joints. The organic form is, in this sense, also the most enduring one.
Full-grain aged cognac leather was chosen for its ability to follow curves without artificial creasing. The stitching follows the geometry of the torus rather than working against it — tracing meridians and parallels across the surface like lines of latitude on a globe, making the constructive logic of the piece visible.
THE WOOD THAT SUPPORTS WITHOUT IMPOSING
The four solid walnut legs emerge discreetly from the base of the sofa — angled outward at a studied degree to visually balance the mass of the seat and ensure stability without requiring additional support points. Walnut, with its dense grain and warm dark tone, speaks naturally to the cognac of the leather: two materials that age well, together.
There are no visible metal components. No mechanisms. Donut functions entirely through geometry and material quality — without technological mediation, without necessary updates. A piece designed to outlast the fashions that surround it.
Donut ideally completes the trilogy of projects — the chair, the car, the sofa — in which I have explored the same principle at three different scales: every form has an internal reason that sustains it. Removing any single element would make the object less itself. That is the boundary between design and decoration.



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