The drawer interior is the inside of a drawer measured wall to wall. Three numbers describe it: internal length (front to back), internal width (left to right), and internal depth (floor to roof). All three should be measured from inside the drawer, not from the cabinet face.
Why interior, not exterior
Drawer-front panels overhang the actual drawer box. A 60 cm cabinet face often hides a 52 cm internal-width drawer. Buying an organiser sized to the cabinet face leaves an 8 cm gap and a tray that slides. The number that decides what fits is the internal width — the wall the organiser will actually touch.
How to measure
- Open the drawer fully. Pull it out as far as the runners allow.
- Measure inside, wall to wall. Hard measure between the left wall and the right wall (internal width); between the front wall and the back wall (internal length); between the floor and the lowest fixed obstruction above (internal depth).
- Round down to the nearest centimetre. Most kitchen drawer walls aren't perfectly square — bowed runners, uneven joinery — and rounding up means the organiser won't fit.
What "flush" looks like
A correctly-sized organiser sits with its base flush against every wall. No slop on the left; no gap on the right; no daylight at the front when the drawer is closed. Runner clearance can eat 25–35 mm of the cabinet face's apparent width — measure inside, not at the face, every time.
Where to start
Take the three measurements to the drawer builder — the builder picks the closest grid base size and shows you which modules fit. See the drawer length, drawer width, and drawer depth entries for the per-axis detail.