Cauliflower head
A cauliflower head is the dense, edible white curd of the cauliflower plant, formed by undeveloped flower buds.
Also known as: cauliflower, cauliflower curd
How big is it?
18 cm · defined curd diameter
Also 7.087 in
Defined curd diameter · defined specimen
Typical recorded range: 14 cm to 24 cm.

A little perspective
Cauliflower head vs Geoduck: length comparison
The curd diameter of a cauliflower head is about 1.06 times the shell length of a geoduck.
A cauliflower head is the dense, edible white curd of the cauliflower plant, formed by undeveloped flower buds.
A geoduck is a large burrowing marine clam with a comparatively small shell and a very long siphon.
Both rulers start at the same zero and share one linear scale. Artwork keeps its original proportions.
Measurements, assumptions & sources +
Cauliflower head
Defined curd diameter: 18 cm; defined specimen; range 14 cm–24 cm.
A defined trimmed white cauliflower head 18 cm across and 1 kg. Cultivar and growing conditions vary; the compact edible curd defines diameter, while leaves and cut stalk are excluded.
USDA FoodData Central — raw fruit portions
The marked defined curd diameter is calibrated. Unmeasured illustration details are representative.
Geoduck
Defined shell length: 17 cm; defined specimen; range 12 cm–22 cm.
A defined Pacific geoduck with a 17 cm shell and 1.2 kg live mass. The long siphon can extend far beyond the shell and is shown for identity, but shell length is the calibrated span.
Washington Department of Fish and Wildlife — Geoduck
The marked defined shell length is calibrated. Unmeasured illustration details are representative.
Use the visual comparison to explore its scale, then check the measurements and sources.
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Why this measurement?
Why we use 18 cm
We compare the curd diameter of a cauliflower head. This is an illustrative comparison value, not a claim that every example is the same. The recorded range is 14 cm to 24 cm.
A defined trimmed white cauliflower head 18 cm across and 1 kg. Cultivar and growing conditions vary; the compact edible curd defines diameter, while leaves and cut stalk are excluded.
The marked horizontal span follows the measured feature, not the edges of the image. How calibrated comparisons work →
Recorded properties
Dimensions and measurements
| Property | Selected value | Recorded range | Basis |
|---|---|---|---|
| 18 cm | 14 cm to 24 cm | defined specimen | |
| 1 kg | 600 g to 1.5 kg | defined specimen |
Around this scale
Explore nearby values.
Compare examples with lower, similar and higher values. Each card names the measurement being compared.
Nearest lower valueEveryday objectsBroccoli head16 cmDefined crown diameterA broccoli head is the compact, edible crown of the broccoli plant, consisting of clustered green flower buds.
Around the same scaleEveryday objectsPencil19 cmLengthA pencil is a writing or drawing instrument with a graphite or coloured core encased in wood or another material.
Nearest higher valueEveryday objectsCabbage head20 cmDefined head diameterA cabbage head is the compact, leafy, edible part of a green cabbage plant, commonly used as a vegetable.Sources and method
Want to check the number?
The source records and measurement method remain available for inspection.
- USDA FoodData Central — raw fruit portionsReference serving masses for raw fruits; dimensions remain explicit atlas specimen choices.
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