How Wide Can Shelves Be

Bookshelf width is typically no more than 12 inches. If the space is limited, the shelf can be reduced to 9 inches. Single bookcase units with two sides, top and bottom should be no wider than 36 inches without a center support.

How wide can a shelf span?

Shelf MaterialMaximum No-Sag Span3/8″ Glass18″3/4″ Particleboard26″3/4″ Plywood32″3/4″ Plywood w/ one 1-1/2″ wide support cleat42″

What is the standard distance between shelves?

The rule of thumb for spacing is 12 inches between each shelf but bump that up to 15 or 18 inches and you enhance that sense of exposure and accessibility. Length is where you’ll see the most variation.

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.

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