Gridfinity dimensions: all values in millimeters
Gridfinity works because every part uses the same dimensions. Here are the key values for reference – from the 42 mm grid to bin heights and magnet holes. They follow Zack Freedman's open specification and the widely used reference project gridfinity-rebuilt.
| Dimension | Value | Meaning |
|---|---|---|
| Grid | 42 × 42 mm | size of one unit on the baseplate |
| Bin outer size | 42 × n − 0.5 mm | 0.5 mm gap so neighboring bins don't jam |
| Height unit | 7 mm | bin height = units × 7 mm, from the bottom to the top of the wall |
| Stacking lip | 4.4 mm | sits on top of the wall and adds to the height |
| Foot profile (bins) | 4.75 mm tall | chamfer 0.8 mm · vertical 1.8 mm · chamfer 2.15 mm |
| Baseplate profile | 4.65 mm + 0.35 mm clearance = 5 mm | chamfer 0.7 mm · vertical 1.8 mm · chamfer 2.15 mm; below it a floor depending on style (Gridmint: Slim 0, Lattice 2, Magnets 3.2, Screw-down 4 mm) |
| Corner radius | baseplate 4 mm, bins 3.75 mm | outside |
| Magnets | 6 × 2 mm | hole Ø 6.5 × 2.4 mm, four per unit |
| Screws | M3 | hole Ø 3 × 6 mm |
| Hole spacing | 26 mm | holes 13 mm from the unit center (8 mm from the unit edge) |
Values as implemented in Gridmint (matched against gridfinity-rebuilt-openscad). Individual models from other makers may differ slightly in tolerances.
Bin sizes in millimeters
A bin that is n units wide measures 42 × n − 0.5 mm on the outside:
- 1 unit: 41.5 mm
- 2 units: 83.5 mm
- 3 units: 125.5 mm
- 4 units: 167.5 mm
- 5 units: 209.5 mm
- 6 units: 251.5 mm
So a 2 × 3 bin covers 83.5 × 125.5 mm.
Bin heights
Height is counted in units of 7 mm, measured from the bottom to the top of the wall. The stacking lip (4.4 mm) adds on top:
- 3 units: 21 mm (with lip 25.4 mm)
- 4 units: 28 mm (32.4 mm)
- 6 units: 42 mm (46.4 mm)
- 8 units: 56 mm (60.4 mm)
- 10 units: 70 mm (74.4 mm)
- 12 units: 84 mm (88.4 mm)
Add the baseplate the bin stands on. Gridmint's planner works out how tall bins can be in your drawer from the drawer height and baseplate style.
How many units fit my drawer?
Inner size minus a little clearance, divided by 42 – rounded down. At 400 mm width with 0.5 mm clearance per side, that's 399 ÷ 42 = 9 units (378 mm). The remaining 21 mm are added to the baseplate as padding. Gridmint does this automatically when you enter the inner dimensions – or pick one of the ready-made templates for IKEA, Systainer and more.
Magnets and screws
Gridfinity uses neodymium magnets 6 mm in diameter and 2 mm tall, four per unit. The holes are slightly larger (Ø 6.5 × 2.4 mm) so the magnets fit. For fixed mounting there are holes for M3 screws. Magnets are optional – bins sit securely in the baseplate without them.
Try the dimensions in the planner
Frequently asked questions
Why is a Gridfinity bin 41.5 mm and not 42 mm wide?
The grid is 42 mm. Bins are 0.5 mm smaller so there's a small gap between neighbors and they lift out easily.
Does the stacking lip count toward the height?
No. The height in units (× 7 mm) goes up to the top of the wall. The stacking lip adds 4.4 mm on top.
Which magnets do I need for Gridfinity?
Round neodymium magnets, 6 mm in diameter and 2 mm tall, up to four per unit.
Related
Gridfinity is an open standard by Zack Freedman. Gridmint is an independent, Gridfinity-compatible tool. Dimensions matched against gridfinity-rebuilt-openscad, as of October 2026.