Kabuli chana sizing: what 8 mm, 9 mm and 10 mm really change

Kabuli chana is the one pulse where the machine, not the eye, has to make the call. It is sold by size, priced by size, and rejected by size. Two containers that look the same across a warehouse floor can be twelve percent apart on price, and the reason is almost always calibration.

How sizing is actually expressed

Two conventions, used interchangeably, which is where most of the confusion comes from.

• By millimetre. The screen aperture the grain passes over — 8 mm, 9 mm, 10 mm and above. Common in Indian and Gulf trade.
• By count. The number of grains per hundred grams. A lower count means bigger grain. Common in European and North American contracts.

Always confirm which one your contract is written in, and get it in writing. A misunderstanding between the two is the most expensive avoidable error in this product.

Why the big sizes carry a premium

Not because they taste better. They do not. Three practical reasons:

1. They are rarer. Grain size is set by the crop and the season. A field does not produce large calibre on demand, so supply is genuinely constrained.
2. They present better. In salad bars, mezze, canned product and anywhere the chickpea is visible whole, a large uniform grain reads as quality to the end customer.
3. They yield better in some uses. Certain canning and processing lines are set up around a size band and run less efficiently outside it.

The thing that matters more than size

Uniformity. A container of honest 9 mm, tightly held, will clear inspection and repeat. A container labelled 10 mm that is actually a mix of 8 mm and 10 mm will get discounted at the other end, argued over, and quietly not reordered.

This is the part buyers underweight. Size is a commercial choice; uniformity is a competence question. When you are assessing a new supplier, the useful test is not whether they can hit 10 mm. It is whether the whole lot sits inside the band they quoted you.

Choosing the right size for your market

• Retail packs and visible-whole use. Larger calibre, tightly held, cream-white and uniform. Worth the premium because the customer sees every grain.
• Hummus, besan and processing. The chickpea is ground or pureed. Mid-size is the sensible commercial answer — buying large calibre here is money spent on something that gets destroyed in the first process step.
• Institutional catering. Consistency of cooking time matters more than appearance, so a tight band at a smaller calibre usually beats a loose band at a larger one.

What to ask a supplier

Ask for the size band, not just the headline size. Ask what percentage falls outside it. Ask whether the lot was calibrated or eye-graded — the answer tells you most of what you need to know. And ask for a sealed sample drawn from the lot you are actually buying, weighed and counted, not from a display bag.