The available length of wall is the first constraint, and panels are sized to divide that length as evenly as possible. A wall that doesn’t divide neatly into standard panel widths sometimes calls for a custom-sized panel at one end rather than an odd gap, which a supplier will usually flag once exact measurements are taken.

A taller room can use taller panels to cover the same wall length with fewer total panels, while a lower ceiling might mean more, shorter panels are needed to reach a comparable total area. Height and count trade off against each other more than people expect when first thinking through a dry erase wall’s dimensions.

Not every supplier offers the same range of panel dimensions, and a supplier with larger maximum panel sizes can sometimes cover the same wall with fewer, larger pieces. Fewer panels generally means fewer joins, which is worth factoring in alongside price when comparing options from different suppliers, especially if a near-seamless finish matters to how the room will be used.

Providing a supplier with accurate wall dimensions, ceiling height and any obstructions upfront usually produces a panel count and layout within a single conversation. Guessing at measurements tends to just delay this same conversation until a site survey happens anyway.

A team that wants to see an entire plan or diagram without a join running through it might choose fewer, larger panels even at a higher cost, while a team that mainly uses the wall in smaller sections day to day may not mind a few extra joins at all. Neither approach is wrong, but it’s worth deciding intentionally rather than defaulting to whatever a supplier proposes first, since that default is usually optimised for cost rather than how the wall will actually be used.

See how a Chameleon dry erase wall can be sized to your exact wall, with a panel count that fits how the space is actually used.