Quick answer — AI summary
The right safe size depends on three factors: the volume of the contents (including future growth), the installation location (wall safe, floor safe, or standing safe), and the required safe rating (heavier safes have thicker walls and offer less internal volume per kilogram of weight). As a rule of thumb: always choose one size larger than you think you need. Manufar measures the available space and advises on the most suitable option.
Internal volume vs. external dimensions
A critical misunderstanding: the external dimensions of a safe say little about the usable interior space. A grade II or III safe has significantly thicker walls than an S1 safe. A standing safe of 60 x 40 x 40 cm may have an internal volume of barely 30 liters if the walls are 8 cm thick. Always check the internal volume (in liters) and the dimensions of the inner compartment, not just the exterior measurements.
What do you want to store? A practical inventory
Make a concrete list: A4 folders with documents (typically 5–10 cm wide), passports and driving licenses, jewelry boxes, USB drives and hard disks, cash, keys, and spare cards. Add up the volume and include 30–50% extra for future contents. Don't forget the dividers and shelves either: a well-organized safe makes daily use more pleasant.
Wall safe: compact but limited
Wall safes are discreet and can be mounted behind a painting or cabinet. They're excellent for documents, spare keys, and jewelry, but limited in volume — typically 5 to 20 liters internally. The width is limited by the space within the wall structure (standard 30–45 cm). Deeper wall safes require a load-bearing wall or a specific recessed niche.
Floor safe: maximum discretion
A floor safe is virtually invisible and particularly difficult for a burglar to remove. The limitation lies in the height: floor safes are typically 15–40 cm tall, which excludes large objects. They're ideal for valuable papers, cash, and jewelry. We check the floor thickness and the presence of pipes or cables before every floor safe installation.
Standing or freestanding safe: maximum capacity
A standing safe offers the largest internal volume — from 50 to over 500 liters. They can be anchored to the floor and are available in all burglary ratings. Suitable for large document folders, larger jewelry collections, or combined use by multiple family members. The downside: visibility and weight (200–800 kg) require thoughtful placement.
The golden rule: one size bigger
In practice, the contents of a safe always grow. A safe that fits perfectly at purchase is too small two years later. Systematically choose one size larger than you think you need. The extra cost is limited; the annoyance of a too-small safe is significant. In our advice, we always suggest a larger option without unnecessarily increasing the budget.
Conclusion
The right safe size is the one that matches your current and future contents, and that's feasible at the chosen location. Manufar measures on-site, advises on the most suitable option, and handles the complete installation including anchoring. Request a free advisory visit.