A bunder or bonnier is an obsolete unit of

area Area is the measure of a region's size on a surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while '' surface area'' refers to the area of an open surface or the boundary of a three-di ...

previously used in the

Low Countries The Low Countries (; ), historically also known as the Netherlands (), is a coastal lowland region in Northwestern Europe forming the lower Drainage basin, basin of the Rhine–Meuse–Scheldt delta and consisting today of the three modern "Bene ...

(Belgium and the Netherlands).

References

Bunder
at sizes.com Units of area Dutch words and phrases Metricated units {{measurement-stub