The number of people who need to read the board at once is the real constraint, not the available wall space. For a 10-person room, that usually means a board wide enough that someone at either end of the table can read it without leaning forward. Measuring from the two furthest seats to the board, rather than simply measuring the wall, gives a far more reliable sense of the minimum width actually needed. This is particularly relevant in rooms with a long, narrow table, where the distance from the far end to the board can be considerably greater than the room’s overall footprint might suggest.

These figures are a starting point rather than a fixed rule, and should be checked against the room’s actual seating layout and viewing distances before finalising a specification.

A room used mainly for status updates needs less writing space than one used for workshops or planning sessions. If the same room hosts both, size for the more demanding use case rather than the average one. It is worth asking how often the room hosts larger, more visual sessions specifically, since those moments are usually what a board size gets judged against later. A quick way to check this is to look back at how the room has actually been used over the past few months, rather than relying on how it was originally intended to be used when first designed.

Running out of space mid-session is one of the most common complaints about undersized boards. A slightly larger board than seems strictly necessary avoids the moment where useful context gets wiped away just to make room for the next idea. Teams that have experienced this once tend to specify generously the second time, having learned that a board sized exactly for today’s agenda rarely accounts for how the conversation actually unfolds.

If the room regularly needs more space than a single large panel provides, a modular whiteboard wall extends the same writing surface across more of the room without losing the continuous, joint-free feel of one board. This tends to become the right answer once a room consistently hosts sessions involving several parallel workstreams rather than one linear discussion.

Because room layouts vary, the most reliable way to land on the right size is to measure the wall and the table together, then have that translated into a specification through an architect or fit-out partner. A specification built this way tends to hold up well even as the room’s use evolves, since it was based on how people actually sit and work in the space rather than an assumption made from a floor plan alone. Sharing this information directly with whoever is managing the specification, rather than relying on a generic size recommendation, tends to produce a far better fit for the specific room.

Every approach above comes back to the same idea: a board sized around how a room is actually used, by the people actually using it, tends to outperform one sized purely to fit the available wall. Room dimensions matter, but they are the secondary factor, not the primary one. Getting this right at the specification stage avoids the far more disruptive fix of realising, a year later, that the room has simply outgrown its board. Revisiting this specification periodically, particularly if the room’s typical use changes, keeps the board aligned with reality rather than with the assumptions made when it was first ordered.

Before settling on a specific size for a large whiteboard, it is worth measuring the actual room rather than relying on a general rule of thumb, since two 10-person rooms can differ considerably in shape and viewing distance. Standing at the furthest seat and checking whether text of a realistic size would still be legible from there is a simple, practical test that catches sizing mistakes before an order is placed rather than after installation.

See how Chameleon large whiteboards can be sized precisely for meeting rooms of any capacity.