How to make a Gridfinity bin
- Pick the grid size – each unit is a 42 mm cell with a 41.5 mm bin footprint, so a 2×3 bin fills a 2×3 baseplate area exactly.
- Pick the height. Bins come in 7 mm units like stock Gridfinity: 2u for screws, 3u for most tools, 6u for pliers.
- Divide it up into compartments, and choose the stacking lip, magnet holes, and optional card or plug slots.
- Download the STL and print it opening-up, no supports needed.
How to make a Gridfinity baseplate
- Switch to Baseplate and pick a grid size – or choose Fit my drawer and type the drawer’s inside width and depth.
- Pick Lite or Magnets. Lite is thin and open underneath; Magnets adds a floor with a pocket under every bin magnet.
- Pick your print bed. Plates bigger than the bed are cut into pieces between cells.
- Download – one STL, or a ZIP with every piece – print flat, no supports, and lay the pieces in the drawer.
Fit and compatibility
| Feature | Dimension |
|---|---|
| Grid pitch | 42 mm (bin footprint 41.5 mm – the standard 0.5 mm gap) |
| Heights | 7 mm per unit + 4.4 mm stacking lip (2u = 18.4 mm, 3u = 25.4 mm, 6u = 46.4 mm) |
| Stacking lip | Standard 4.4 mm profile – stacks onto bins and clicks into baseplates |
| Underside | Standard Gridfinity foot under every unit (0.8 mm 45°, 1.8 mm straight, 2.15 mm 45°) – locks into baseplates and the lip of the bin below |
| Magnet holes | Ø6.5 × 2.4 mm deep, 8 mm in from each unit edge (6 × 2 mm magnets) |
| Screw holes | M3, 6 mm deep from below at every magnet pocket (an M3×6 screw); the inside floor stays closed |
| Baseplate | 42 mm cells, r 4 corners, 4.65 mm pocket (0.7 mm 45°, 1.8 mm straight, 2.15 mm 45°); bins stand on the floor with 0.25 mm clearance on every face. Magnet style: +3.4 mm floor (open in the middle of each cell), Ø6.5 × 2.4 mm pockets 8 mm in from the cell edges |
| Slot fit | SD 24 × 32 × 2.1 mm; microSD 11 × 15 × 1.0 mm; USB-A shell 12 × 4.5 mm; USB-C shell 8.4 × 2.6 mm. 0.4 mm total default clearance on width and thickness. |
Recommended print settings
| Setting | Value |
|---|---|
| Material | PLA (stiff, best for drawers) or PETG (tougher) |
| Layer height | 0.2 mm (0.28 mm works for tall bins) |
| Walls | 3 |
| Infill | 10–15% – the base is the thick part |
| Supports | None (print opening-up; the feet sit flat on the bed) |
Free STL downloads
Ready-made Gridfinity bins from this generator, with magnet holes and the stacking lip:
Need another size, more dividers or card slots? Change the settings above and download your own bin.
Frequently asked questions
Will these bins fit my Gridfinity baseplates?
Yes. The bins follow the standard Gridfinity dimensions: 42 mm grid with a 41.5 mm bin footprint (0.5 mm gap), stock-compatible heights (7 mm per unit plus the 4.4 mm stacking lip) and the standard stepped foot under every unit, so they drop into any Gridfinity baseplate and stack onto other bins.
Do the bins stack on top of each other?
Yes – the top lip is the standard 4.4 mm stacking profile, so bins click onto each other and into any Gridfinity baseplate. You can turn the lip off if you do not care about stacking and want a slightly shorter bin.
What size are the magnet and screw holes?
Each grid unit gets four pockets for 6 mm × 2 mm magnets (6.5 mm diameter, 2.4 mm deep, 8 mm in from the unit edges) with a 6 mm deep M3 screw hole in the middle of each – the floor inside the bin stays closed. The pockets open on the underside: press the magnets in (a drop of glue keeps them in place).
Which cards and plugs fit the optional slots?
The slots are sized for full-size SD cards (24 × 32 × 2.1 mm), microSD cards (11 × 15 × 1.0 mm), USB-A shells (12 × 4.5 mm), or USB-C shells (8.4 × 2.6 mm), with 0.4 mm total width and thickness clearance by default. Actual connector housings can vary.
How tall should my bin be?
Bins come in 7 mm units: 2u (18.4 mm) for screws and small parts, 3u (25.4 mm) for most tools, 6u (46.4 mm) for pliers and drivers. The height you pick is the inside depth plus the base.
How do I make a baseplate that fits my drawer?
Switch to Baseplate, choose “Fit my drawer” and type the inside width and depth of the drawer. The generator fits as many whole 42 mm cells as it can (1 mm smaller than the drawer by default) and fills the rest with solid padding, split evenly or all on one side. Plates bigger than your print bed are cut into pieces between cells – lay them side by side in the drawer.
Lite or magnet baseplate?
Lite is the classic thin baseplate: 4.65 mm tall and open underneath, so it uses very little filament. The magnet baseplate adds a 3.4 mm floor with a pocket for a 6 × 2 mm magnet under every bin magnet, so bins with magnets snap down and stay put. The middle of each cell’s floor is left open to save filament.
Is it free to use?
Yes. Generate and download as many bins as you like, with no account. Everything runs in your browser.