# Best divided storage boxes for crafts and small parts
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Buying guide · [Boxes & shelves](https://spacemadeuseful.co.uk/boxes-and-shelving/) ·
Compare fixed cells, removable dividers and two lift-out tray layers. Check actual compartment size, lid gaps and carrying behaviour with your own supplies.
Space Made Useful · Updated November 2026 · 3 options compared ·
Quick answer
## Fit the largest component and contain the smallest one
Check usable cells and the lid before choosing by compartment count. Use fixed cells for repeatable groups, removable dividers for changing sizes or lift-out layers for work you take to a table.
## Three ways to divide small supplies
Outside dimensions describe the complete case. Check the actual cell and the height below the closed lid separately.
Fixed divisions in a shallow carrying case
### Raaco Assorter 4-32 compartment case
A shallow case with 32 fixed cells, sliding locks and lid profiles designed to retain the divided groups.
**Outside · W × D × H**: 33.8 × 26 × 5.7 cm
**Access**: Fixed cells and sliding locks
**In the pack**: One 32-cell case
**What to check** The fixed cell pattern cannot widen for a long spool. Check the smallest parts against the lid clearance; no universal tiny-bead spill guarantee is established.
View on Amazon — Raaco Assorter 4-32 compartment case
Movable dividers for varied groups
### Stanley SortMaster Junior organiser
A carrying organiser with 14 compartments and eight removable dividers, allowing some groups to occupy a larger space.
**Outside · L × W × H**: 37.5 × 29 × 6.7 cm
**Access**: Removable dividers and locking lid
**In the pack**: One organiser
**What to check** Check each required compartment with its actual part. Interlocking lid features reduce movement between cells but do not establish a seal for every tiny item.
View on Amazon — Stanley SortMaster Junior organiser
Two lift-out fixed-cell layers
### Really Useful 4L Hobby Box with trays
One clear lidded four-litre box with two 15-cell hobby trays that lift out separately.
**Outside · L × W × H**: 39.5 × 25.5 × 8.8 cm; trays 34.2 × 21.5 × 3.5 cm each
**Access**: Clip lid and lift-out trays
**In the pack**: One box and two 15-cell trays
**What to check** The trays are not individually lidded. Keep the packed box flat and check the contents against the actual cell floor and usable height.
View on Amazon — Really Useful 4L Hobby Box with trays
## Side-by-side dimensions
Scroll sideways to see all columns.
Published complete-case dimensions and internal arrangement
| Case | Outside size | Divisions | Access |
| --- | --- | --- | --- |
| Raaco Assorter 4-32 | 33.8 W × 26 D × 5.7 H cm | 32 fixed cells | One shallow layer |
| Stanley SortMaster Junior | 37.5 × 29 × 6.7 cm | 14 cells; eight removable dividers | One adjustable layer |
| Really Useful 4L Hobby | 39.5 × 25.5 × 8.8 cm | Two 15-cell trays | Two lift-out layers |
## Measure the smallest part and the longest useful group
Lay out a representative group of the supplies you want to store. Include the longest spool, widest packet, tallest reel and smallest loose piece. A compartment box can separate many groups while still being too shallow for one item or too open around its lid to contain very fine parts. Choose the cell shape around the actual contents rather than the advertised number of compartments.
Decide whether you need to see every group at once or remove one tray to a work surface. Fixed cells keep the same pattern each time. Removable dividers allow some spaces to widen, but the adjustment points and remaining walls still determine the final shape. Lift-out trays give access to separate layers; they also introduce another movement when the group below is needed.
Keep products in any packaging needed for their own storage instructions. A divided craft case can group packets or suitable dry components, but it does not replace a required protective container. Put fine beads or other pieces that could escape through a gap into a suitable closed inner packet where appropriate. Check the inner packet itself against the usable cell floor.
## Check usable cell space and the closing lid
Use the outside case dimensions for shelf fit and the inside cell dimensions for the parts. Include sloping walls, rounded corners and divider thickness. Where no reliable cell measurement is published, compare the actual part with the maker’s layout or ask about the selected model. Dividing the overall case width by the cell count gives a misleading result because the frame and partitions take space.
The selected Really Useful hobby tray has an outside size of 34.2 × 21.5 × 3.5 cm and fixed cell floors of approximately 6.5 × 6.8 cm. Check the height of the stored component separately. A cell’s outside wall height does not establish the clearance available below another tray or the outer lid. A tall reel can prevent the upper layer sitting flat.
**Illustrative cell check.** A square packet measures 7.2 × 7.2 cm and will not lie flat in a 6.5 × 6.8 cm cell without bending. A larger outside case does not change that cell. Use a permitted larger compartment or a different storage format for the packet.
## Compare fixed cells, adjustable divisions and lift-out layers
The [Raaco Assorter 4-32](https://spacemadeuseful.co.uk/best-divided-storage-boxes/#raaco-assorter-4-32) is a shallow blue-and-clear case with 32 fixed compartments. Its manufacturer gives 33.8 cm width, 26 cm depth and 5.7 cm height. The selected Amazon dimensional fields conflict with that specification, so use the maker’s measurements. Sliding locks and profiles inside the lid are designed to retain the groups, but they do not establish that every tiny bead will remain isolated when the case is turned over.
The [Stanley SortMaster Junior](https://spacemadeuseful.co.uk/best-divided-storage-boxes/#stanley-sortmaster-junior) has a 37.5 × 29 × 6.7 cm outside body, 14 compartments and eight removable dividers. It gives more layout flexibility where one long component needs a larger space. Check the resulting compartment with that part and close the lid without pressing on the contents. The maker’s interlocking lid features reduce movement between cells. They are not a universal fine-particle or waterproof seal.
The [Really Useful 4L Hobby Box](https://spacemadeuseful.co.uk/best-divided-storage-boxes/#really-useful-4l-hobby) contains two lift-out trays, each with 15 fixed cells, inside one 39.5 × 25.5 × 8.8 cm outer box. This offers 30 cells across two levels. The trays have no individual lids, so keep the packed set flat and follow its intended use. The outer blue handles secure the main lid; they do not convert each inner layer into a separately closed carrying case. Contents shown in the photographs illustrate use and are not the supplied craft materials.
## Test carrying and returning the actual contents
Close every latch as instructed and carry a lightly filled representative set in its intended orientation. Open it on a stable surface afterwards to check where the pieces sit. If a small item can pass over a divider or under the lid, change its inner packaging or storage format. Avoid assuming a short carrying trial certifies the case for inversion, shaking or every future component.
Keep the parts you use most in the most accessible cells. A lift-out layer can be useful for taking a whole group to the table, while a fixed cell case avoids putting a second tray aside. Leave enough space to pick up the smallest item with your normal tools or fingers. Mark the group in a way that remains readable when the case is on its shelf.
Check the case’s loaded weight against its own carrying limit and a comfortable grip. Then check the [shelf’s load rating](https://spacemadeuseful.co.uk/read-shelving-load-ratings/) for all the cases together. For longer loose tools or material packets, compare the [modular drawer tray guide](https://spacemadeuseful.co.uk/best-modular-drawer-trays/); for bulk reserve supplies, use the [nesting-box comparison](https://spacemadeuseful.co.uk/best-nesting-storage-boxes/) and keep the daily small-parts group separate.
## Questions before you choose
### Are fixed or removable dividers better?
Fixed cells preserve one pattern. Removable dividers can enlarge some spaces, but you still need to check the permitted positions against the longest component.
### Will an organiser stop tiny beads moving between cells?
Check the actual lid-to-divider gaps. Retaining profiles are not a universal fine-bead seal; use suitable closed inner packaging where needed.
### How many cells come with the Really Useful hobby box?
The selected offer contains two fixed trays with 15 cells each, giving 30 cells across two layers inside one outer box.
### Can I carry the inner hobby trays on their own?
They lift out but have no individual lids. Keep them flat and supported; the outer box handles secure the main lid rather than each tray.
### Are the pictured craft materials included?
The verified offers supply the organisers and stated dividers or trays. Materials shown in use photographs illustrate storage and are not the supplied contents.
## How this shortlist was assembled
We checked three Amazon UK variants against primary maker specifications and selected galleries. We use documented cell dimensions only for the Really Useful hobby tray and distinguish lid-retaining features from a seal.
[Read our source policy](https://spacemadeuseful.co.uk/source-policy/)
**Space Made Useful**
We compare documented dimensions, opening mechanisms and other details that help you choose storage for the space you have. [How we research our guides](https://spacemadeuseful.co.uk/editorial-policy/).
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