For six people you want a rectangular dining table around 180cm long and 90cm wide, or a round table of 130cm. A 150x90cm table will seat six at a squeeze. The rule behind those numbers is simple: allow 60cm of table edge per person, and leave 90cm of clear floor on every side you actually use.
The two numbers that decide everything
Almost every sizing mistake comes from measuring the table and forgetting the room. There are only two figures you need.
1. Allow 60cm of table edge per person
Sixty centimetres is the width of a comfortable place setting — dinner plate, side plate, glass, cutlery either side, and enough elbow room that you are not knocking into the person next to you. It is the figure the whole furniture trade works to, and it holds up in practice.
Below 55cm per person, shoulders start to touch and people begin eating with their arms tucked in. Above 70cm, the table starts to feel sparse and conversation across it gets harder.
2. Allow 90cm of clearance around the table
This is the gap between the table edge and the nearest wall, radiator, sideboard or kitchen island. Ninety centimetres lets a seated diner push their chair back and stand up without asking the room's permission. Here is the breakdown:
- 45–50cm — the distance a dining chair travels backwards when someone gets out of it. This is the absolute floor.
- 75cm — the tightest workable clearance. Chairs come out, but nobody can walk behind a seated diner.
- 90cm — comfortable. Chairs come out and someone can edge past behind them.
- 100–120cm — what you want on any side that doubles as a walkway, or in an open-plan kitchen where people carry hot pans past the table.
Six-seater table sizes at a glance
| Table | Edge per person | Verdict for six |
|---|---|---|
| 150 x 90cm rectangular | ~50cm on the long sides | Six fits, but it is a friendly squeeze. Better as a generous four-seater. |
| 180 x 90cm rectangular | ~60cm on the long sides | The right answer. Three each side, or two each side plus one at each end. |
| 200 x 100cm rectangular | ~66cm on the long sides | Six with room to spare, and eight when you need it. |
| 110cm round | ~86cm of circumference each | Four comfortably. Five at a push. Not six. |
| 130cm round | ~68cm of circumference each | Six comfortably, with no corners to work around. |
| 130 x 130cm square | ~65cm per side | Four generously, six workable with two on one side. |
How six people actually sit at a 180cm table
There are two layouts, and they are not equivalent.
Three a side, ends empty. 180cm divided by three is 60cm each — textbook. This is the layout to plan for, because it keeps the ends of the table free for serving dishes, and it means nobody is sitting in the walkway at the end of the table.
Two a side plus one at each end. This gives the four side diners 90cm each, which is luxurious, but the two people on the ends need the table base to allow it. On a table with four corner legs, an end seat can end up straddling a leg. On a single-pedestal base like our Ariel collection, or the twin-pedestal Ariana, the ends of the table are completely clear and a chair slides straight in. If you like the four-leg look of the Louis collection, plan on three a side rather than seating the ends.
The room size you need — a worked example
Take the 180 x 90cm table and add 90cm of clearance on all four sides:
- Length: 180cm + 90cm + 90cm = 360cm
- Width: 90cm + 90cm + 90cm = 270cm
So a 180cm six-seater wants a clear floor area of roughly 3.6m x 2.7m. That is a fairly typical UK dining room or the dining end of a through-lounge.
If your room is tighter than that, do not panic — you can borrow clearance from a side you do not use. A table pushed towards a wall with only 75cm behind it works perfectly well if that side seats nobody and nobody walks there. What you cannot borrow from is a side people both sit on and walk past. That is where 90cm is non-negotiable.
Run the same sum on a 130cm round table and you need 130 + 90 + 90 = 310cm in both directions, or roughly 3.1m x 3.1m. Round tables are more forgiving in a squarer room, and there are no corners to catch a hip on when you walk past.
Measure your room properly first
- Measure the floor area, wall to wall, in both directions.
- Subtract anything permanent that eats into it — a radiator sticks out about 10cm, a skirting board 2cm, an open door swings through roughly 80cm.
- Subtract 180cm of clearance from each direction (90cm at each end).
- What is left is the biggest table the room will take.
Then do the tape-on-the-floor test. Mark out the table footprint with masking tape, put a dining chair on the line, and sit in it. Push back and stand up. If that feels cramped with tape, it will feel worse with 120kg of marble in the way.
Do not forget the chairs themselves
Six place settings only works if six chairs fit. Chair width matters more than people expect: a wide, low-backed chair with generous padding measures around 50–55cm across, so six of them along a 180cm table need the seats to be genuinely 60cm apart at the table edge. A slimmer high-backed chair takes up less width but more visual height, which changes how a small room feels rather than how it fits.
This is one of the arguments for buying a table and chairs as one set rather than assembling them separately. When the chairs are designed around the table, the count that is offered — four, four plus a bench, six, eight or ten — has already been checked against the table's length. You can see how each of our sizes pairs up across the rectangular and round ranges.
If you are between two sizes
Go bigger, as long as the 90cm clearance survives. A slightly-too-large table in a room that still allows chairs to move is a table you will use for homework, laptops and Christmas. A slightly-too-small table is a table where the serving dish never has anywhere to go.
The exception is a walkway. If sizing up drops one side below 75cm and that side is how people get to the kitchen, size down. Nobody enjoys a dining room they have to turn sideways to cross.