The dining table size you need is set by two numbers: 60cm of table edge per person, and 90cm of clear floor around the table. As a starting point, four people need a 150 x 90cm rectangular or 110cm round table, six need 180 x 90cm or 130cm round, eight need 200 x 100cm, and ten need 200 x 100cm used at full stretch.
That is the short answer. The rest of this guide shows you how to check it against your actual room, because the table that fits the family is not always the table that fits the floor.
Step one: measure the room, not the table
Most people start by picking a table they like and hoping. Reverse it. Measure the clear floor area of the room in both directions, subtract 180cm from each (that is 90cm of clearance at each end), and whatever is left is the largest table the room will take.
A 4m x 3m dining room, for example, allows a table up to 220cm x 120cm. A 3.2m x 3m room allows 140cm x 120cm — which points you at a round or square table rather than a long rectangle.
Take off anything that steals floor space before you do the sum: a radiator projects about 10cm, a skirting board 2cm, and a door swings through roughly 80cm of arc.
What the 90cm clearance actually buys you
- 45–50cm is how far a dining chair travels back when someone stands up. Anything less and the chair hits the wall.
- 75cm is the tightest usable clearance — chairs work, but nobody squeezes behind them.
- 90cm is comfortable, and lets someone edge past a seated diner.
- 100–120cm is what you want on a side that is also a walkway, or in an open-plan kitchen.
You are allowed to borrow clearance from a side nobody sits on or walks past. You are not allowed to borrow it from the route to the kitchen.
Step two: match the size to the number of seats
| Seats | Rectangular | Round / square | Clear floor needed |
|---|---|---|---|
| 4 | 150 x 90cm | 110cm round, or 130 x 130cm square | 3.3m x 2.7m (rectangular) |
| 6 | 180 x 90cm | 130cm round | 3.6m x 2.7m |
| 8 | 200 x 100cm | — | 3.8m x 2.8m |
| 10 | 200 x 100cm (four a side, one each end) | — | 3.8m x 2.8m, more if the ends are used |
Four seats
A 150 x 90cm rectangular table gives two people 75cm each along the long sides — generous. It is the size most UK dining rooms take without argument, and it is the one to choose if the room doubles as anything else.
A 110cm round table is the alternative, and often the better one in a small or awkward room. Its circumference is about 345cm, which divides into four seats of roughly 86cm each. There are no corners to walk into, and on a single-pedestal base there is nothing under the table to straddle. A 130 x 130cm square seats four very comfortably indeed, with one person per side and space in the middle for everything else.
If four is your normal but six happens at weekends, look at a 150cm table with the four-chairs-plus-bench option. The bench tucks completely under the table when it is not in use, so the footprint stays a four-seater's footprint and you gain two seats when you need them.
Six seats
180 x 90cm is the answer, giving three people 60cm each along both long sides. A 130cm round table also seats six, at about 68cm of circumference each.
The layout question is whether you seat the ends. Two a side plus one at each end gives the side diners a luxurious 90cm, but the end seats only work if the base allows it — a four-legged table can put a leg exactly where an end chair wants to go. Pedestal bases keep the ends clear, which is why the six-seater sizes in our rectangular range are worth comparing base by base.
Eight seats
200 x 100cm is the practical eight-seater: three a side at 66cm each, plus one at each end. The extra 10cm of width over a 90cm table matters more than it sounds — it is what lets two people opposite each other both have a place setting and still leave a strip down the middle for serving dishes, water jugs and candles. On a 90cm-wide table, the middle strip disappears the moment plates go down.
Eight seats is also where the base design stops being purely aesthetic. With four people down each side and one at each end, corner legs will interfere with somebody. If you are seating eight regularly, a pedestal base is the safer choice.
Room-wise, 200 + 180 = 380cm in length and 100 + 180 = 280cm in width. If your room cannot give you 3.8m in one direction, eight seats at full comfort is not realistic — though eight for two hours at Christmas certainly is.
Ten seats
Ten around a 200 x 100cm table means four a side at 50cm each, plus one at each end. Fifty centimetres is below the comfortable place setting, so this is a configuration for occasions rather than for Tuesday. It works — people do it every December — but plan on plates being closer than usual and on serving from a sideboard rather than the table itself.
If ten is your regular number rather than your festive one, the honest advice is that no single 200cm table does it comfortably, and you should be thinking about a table plus a second surface. If ten is your Christmas number, a 200 x 100cm set with the ten-chair option is exactly the right buy: the chairs live around the house the rest of the year and come back to the table when you need them.
Step three: check the chairs, not just the table
Six place settings only helps if six chairs physically fit. A wide, low-backed chair with deep padding measures roughly 50–55cm across; a slim high-backed chair takes less width but adds height, which changes how a small room reads. Both need the same 45–50cm behind them to get out.
This is the practical argument for buying a table and chairs together rather than separately: the chair counts on offer — four, four plus a bench, six, eight, ten — have already been checked against each table length, so you are not guessing whether eight of a particular chair will actually line up along 200cm. You can compare the two chair shapes across the Majestic and Lucy ranges, and see every size in one place under all marble dining tables.
Step four: tape it out before you commit
Mark the table footprint on the floor with masking tape. Put a real dining chair on the line, sit in it, push back and stand up. Then walk the route to the kitchen. A table that fails the tape test will fail worse when it weighs well over 100kg and is not going anywhere.
When in doubt, size up
If two sizes both survive the clearance check, take the larger one. A big table absorbs homework, laptops, paperwork and guests. A small table runs out of room the moment the serving dish arrives. The only reason to size down is if the larger table drops a walkway below 75cm — that is a compromise you will resent every single day.