You're about to move. Or renovate. Maybe you're finally moving in with that one special person. Congratulations. But then it begins. You look at your living room and ask yourself: "Will all of this fit in a 6 square metre box?" The honest answer: probably yes. But m² and m³ mean nothing to most people. We make it tangible.
At Cobalt Box, we don't believe in guessing. We believe in space. Space in your head and space for your stuff. That's why we help you skip the maths. Below you'll learn how to translate your belongings into the perfect box. No fuss.
The biggest mistake: paying for air
Most people rent too much space. They see a pile of boxes and panic slightly. They forget that you can stack things inside a storage unit. A box isn't a floor area; it's a volume.
At traditional providers, you're often talked into a bigger unit "just to be safe". We do things differently. Our tech is smart, but your common sense is smarter. If you stack efficiently, a fraction of your home's surface area is often enough.
The rule of thumb for apartments
Do you live in a standard apartment or house? Use this quick estimate:
- Studio (40-50 m²): a box of 3 to 5 m² is usually enough.
- 2-bedroom apartment: think 6 to 9 m².
- Family home: here we're often talking about 12 m² or more.
Hesitating between two sizes? Check our transparent storage pricing to see the budget step.
Visualise your belongings: the checklist
Let's make it concrete. What actually fits in an average Cobalt Box of 6 m² (about 15 m³)?
- 30 moving boxes, neatly stacked.
- One three-seater sofa, on its side.
- A dining table, legs disassembled.
- Four chairs, slid into each other.
- Your washing machine, at the bottom as a base.
- A double mattress, against the wall.
- The fridge (don't forget to defrost it).
That fits. And you still have room for that one box of Christmas decorations you actually wanted to throw out.
Stack smart like a pro
Saving space is an art. Or rather: a logistics game. Want to rent the smallest (and therefore cheapest) box? Follow these principles:
- Heavy at the bottom, light on top. Your washing machine and fridge are your foundation. Use them as a table for lighter boxes.
- Disassemble everything. A table takes up 80% air. Take off the legs. It saves you metres.
- Use the height. Our boxes are tall. Stack to the ceiling. The top layer is for your cushions, blankets, and soft bags.
- Fill the void. A wardrobe isn't just furniture, it's a storage container. Fill the drawers with books or fragile items.
Expert tip: leave a small walking path free in the middle of your box. Nothing is more frustrating than needing that one box stuck at the very back, at the bottom. For more practical tips, read our guide on furniture storage.
Why choosing the right size pays off
At Cobalt Box, we focus on long-term relationships, not quick promo-hoppers. If you choose the right size, you never overpay. Our pricing is transparent. No hidden costs, no fuss with physical keys. Your smartphone is your access.
By critically reviewing what you really need to keep, you create not only physical space but also peace of mind. That's exactly why we also wrote about decluttering for extra space at home. "Later" needs a place — but that place doesn't have to be bigger than strictly necessary.
Calculate it yourself
Want it on paper? Try our space calculator: in just a few clicks, you'll see which box fits your belongings. Prefer a second opinion? These external sources will help you prepare for your move:
- Self-moving checklist — Dockx Movers: a handy checklist for moving day.
- Moving checklist — Test-Aankoop: independent advice on the logistics of moving (and the storage that goes with it).
Want to know what you need to arrange in advance? Check out our moving storage page.
Ready for more space?
You now roughly know what you need. Not in the mood for complicated calculations? Our locations are designed for smooth use: Machelen, Mortsel, Deurne, Brasschaat, Merksem, and Aalter.
Sorted online today, your box is ready. No office hours, no waiting times. Just grab your smartphone, choose your box, and clear your head. Because your home is for living in. Our boxes are for storing.
Book your box online in less than 2 minutes or schedule a free visit to one of our locations.
Conclusion
Choosing the right box size isn't maths — it's common sense. Stack smart, disassemble what you can, and choose deliberately. That way you only pay for space you really use, not for air.
Ready to store your belongings safely?
Discover our storage locations or book directly online.