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By the Joybuy Product Recommendation Officer, July 19, 2026
A cube shelving unit, like the popular KALLAX from IKEA, is a practical storage solution. However, without the right organisation, these open shelves can quickly become a cluttered collection of loose items. A good storage box for your cube shelf solves this problem. It creates a sense of order and keeps your belongings neatly out of sight.
But which box is the right fit? The selection is vast, and specifications aren't always clear. In this article, we'll guide you with practical tips and a selection of popular options, helping you make a choice that suits your shelf, interior, and belongings.
Before making a decision, there are a few key points to help you find the right storage box.
The most common mistake is buying a bin that doesn't quite fit. The standard internal dimension of many cube shelves is approximately 33 x 33 cm. A 31x31 storage bin or a 31x31x31 cm storage box is therefore often a perfect fit, as it leaves enough clearance to easily slide the box in and out. To be safe, always measure the internal dimensions of your specific shelf compartment before ordering.
The material determines not only the aesthetic but also the sturdiness. A wooden storage box, often made of MDF, offers a sleek and robust look. This material is rigid and resistant to bumps, which is useful for storing heavier items like toys or paperwork. Fabric bins are lighter but can begin to sag over time.
Consider how you will use the storage box. A storage box with a handle is essential if you plan to frequently pull the box from the shelf. It makes the shelf bin much more user-friendly. Another practical feature is collapsibility. A collapsible storage box is ideal if you don't need it temporarily; you can store it flat without it taking up much space.
Based on the criteria above, we have listed some of the most popular models. These options are all 31 x 31 cm, ensuring they fit in most standard cube shelving units.
Why It Stands Out This white storage box features a sleek, minimalist design. Its MDF fibreboard construction provides a solid and rigid structure, unlike flexible fabric bins.
Advantages
Who Is This a Good Choice For? For those who want a tidy, bright, and modern look in their home. The neutral white colour fits into almost any interior, from the living room to the children's room.
View the 5five White Storage Box
Why It Stands Out This box combines a warm wood tone with steel reinforcements for an industrial look. It's a striking piece that is more than just a functional storage item.
Advantages
Who Is This a Good Choice For? Perfect for fans of an industrial, robust, or rustic interior. The box adds character to a simple cube shelf.
View the 5five Industrial Storage Box
Why It Stands Out With a height of 15 cm, this box is half as tall as the standard models. This makes it ideal for shelves where you store shorter items like books, magazines, or tablets, without them disappearing completely inside.
Advantages
Who Is This a Good Choice For? Useful for those who want to store shorter items or maintain a more open and airy look in their cube shelf.
View the 5five Light Brown Storage Box (15 cm)
Why It Stands Out The 'grey wash' finish gives this box a soft, neutral look that is easy to style. It's a subtle colour that brings a sense of calm to your interior.
Advantages
Who Is This a Good Choice For? A great option for those seeking a quiet and subtle storage solution that is stylish and functional without drawing too much attention.
View the 5five Grey Storage Box
If the perfect storage box for your cube shelf isn't among these, or if you're curious about other styles and materials, there are more options than just the standard cube shape. Consider bins made of rattan, felt, or storage boxes with lids.
For a broader overview of storage possibilities, you can browse our assortment.
Discover more in our category: rustic wooden storage unit
1. Will these 31x31 cm storage boxes fit in an IKEA KALLAX shelf? Yes, the internal dimensions of a KALLAX compartment are approximately 33.5 x 33.5 cm. A 31 x 31 cm storage box fits well, leaving enough room to pull the box out smoothly. However, it is always recommended to measure your own unit just to be sure.
2. Aren't these wooden storage boxes very heavy? The boxes are made of MDF, which makes them sturdy, but their weight is still manageable. For example, the white box weighs 2.87 kg and the grey version weighs 2.15 kg. They are heavier than a fabric bin but are still easy to handle, even for children.
3. How much weight can a collapsible storage box hold? According to the manufacturer's specifications, the models mentioned above have a maximum load capacity of 5.0 kg. It is advisable not to exceed this weight to ensure the box's longevity and prevent the bottom from sagging. They are primarily intended for organising loose, not extremely heavy, items.
