A dining table that is too small for the room looks lost. One that is too big leaves no space for chairs to push back. The good news is that there are two well-established rules — clearance and place setting — and once you have those, the choice gets easy.
Rule one: 90cm of clearance, every side
You need 90cm between the edge of the table and the nearest wall, sideboard or other piece of furniture. This is the distance required to pull a chair out, sit down, and walk past someone seated, without anyone moving. It is not optional — at 60cm you cannot push the chair back; at 75cm one person can sit but no one can walk behind them.
Translated to the room: take your room dimensions and subtract 180cm in each direction. What is left is the maximum table footprint.
- 3m x 3m room: table up to 120cm x 120cm.
- 3m x 4m room: table up to 120cm x 220cm.
- 4m x 5m room: table up to 220cm x 320cm.
If the table sits on one wall (banquette-style) or in a corner, you can drop the clearance on the wall side to zero, but the other three sides still need 90cm.
Rule two: 60cm per place setting
Each diner needs 60cm of table edge for plate, glass, cutlery and a comfortable elbow. The table’s seating capacity is therefore the perimeter divided by 60. A round 120cm table seats four (377cm perimeter / 60 ≈ 6.3, but round tables lose two settings to the curvature where chairs would not fit comfortably). A 180cm rectangular table seats six (two long sides at 180cm each = 6 settings; the short ends seat 1 each but chairs there block the room).
Some quick numbers we use most often:
- Round 100cm: seats 4.
- Round 120cm: seats 4 to 6.
- Round 140cm: seats 6.
- Rectangular 140cm x 80cm: seats 4 (6 at a squeeze).
- Rectangular 180cm x 90cm: seats 6 (8 at a squeeze).
- Rectangular 220cm x 100cm: seats 8.
- Extending tables add 40cm to 60cm per leaf. Buy the closed length to suit the room day-to-day, the open length to suit the largest dinner you actually host.
Round vs rectangular vs oval
Round tables work in square rooms and are sociable — everyone faces everyone. They are inefficient at scale; above six people a round table reads as enormous. Rectangular tables are space-efficient and the obvious choice for long rooms. Oval tables are the compromise — the soft corners make them safer in tight spaces and they read smaller than the same-footprint rectangle.
Pedestal or four-leg base?
Pedestal bases (single column or double-pedestal) put no leg in the way of seating. You can fit one extra chair on each long side compared to a four-leg version. Four-leg bases are more stable for very long tables (220cm and above) and tend to be cheaper for the same surface size.
Test it before you buy
Mark the footprint on the floor with masking tape. Put your existing chairs against it — pulled out as if you were sitting — and walk past. If you can carry a plate around the room in both directions, the table fits. If you cannot, drop a size.
Browse our dining tables, sortable by size and shape. We list closed and extended dimensions on every extending model.
