What folder size do I need? Spine widths explained
by Wiepa GmbH on Jun 30, 2026Office Organization Guide
What folder size do I need? Spine widths explained simply
The appropriate folder size depends on how many documents need to be filed and how often the folder will be used. For a few documents, narrow folders are sufficient; for ongoing filing and archiving, wide folders are usually more practical.
Folders are a classic office essential. Nevertheless, the choice isn't always straightforward: 5 cm or 8 cm spine width, narrow or wide, DIN A4 or special format? This guide helps you make the right decision.
Short answer
For a few documents, narrow folders with a spine width of about 5 cm are suitable. For larger quantities, ongoing filing, or archiving, wide folders with a spine width of about 8 cm are often the better choice. DIN A4 is the standard format in the office.
Folder sizes compared
| Folder Type | Typical Spine Width | Suitable for |
|---|---|---|
| Narrow folder | approx. 5 cm | Projects, client files, smaller processes |
| Wide folder | approx. 8 cm | Ongoing filing, accounting, archive |
| Ring binder | various | Training, presentations, documents with frequent changes |
| Archive box file | usually wide | Long-term storage and documentation |
When is a narrow folder sufficient?
A narrow folder is useful when documents need to remain manageable and not too many papers are filed. It takes up less shelf space and is well suited for individual projects, client files, HR documents, or smaller processes.
- fewer documents per topic
- frequent access to individual documents
- organized project filing
- limited shelf space
- clear separation by client, project, or department
When is a wide folder better?
Wide folders offer more space and are ideal when many documents are collected. Typical applications include accounting, invoices, delivery notes, contracts, annual documents, or archive holdings. They are particularly practical when documents are collected over a longer period.
- larger quantities of documents
- ongoing filing
- accounting and invoicing
- archiving by year
- fewer folder changes needed
Suitable products in the Wiepa Shop
DIN A4 is the standard in the office
For classic office work, DIN A4 is the most important folder size. Invoices, contracts, delivery notes, offers, and printouts are usually filed in DIN A4. Special formats are only useful if other document sizes are processed regularly.
More order with dividers and index sheets
The right folder size alone is not always enough. Dividers, index sheets, labels, and tags ensure that documents are found more quickly. Especially for accounting, HR, projects, or customer files, a clear structure pays off.
Frequently Asked Questions
What is the most common folder size in the office?
DIN A4 folders are most commonly used. Depending on the quantity of documents, narrow folders with about 5 cm or wide folders with about 8 cm spine width are used.
What's better, 5 cm or 8 cm folders?
5 cm folders are more organized and space-saving. 8 cm folders are better suited for larger quantities, accounting, and archiving.
What folders do I need for accounting?
For accounting, wide DIN A4 folders are often used, frequently supplemented by dividers for months, document types, or cost centers.
Sources and Guidance
When selecting folders, companies should consider the volume of documents, retention period, frequency of access, and available shelf space. This article serves as a practical guide for office supplies, filing, and archiving.
Related pages: Office Supplies, Office Procurement, E-Procurement and Folders in the Shop
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