Case skills 7 min readLast reviewed 23 October 2026Sample
Market sizing
Top-down and bottom-up, segmenting, and sense-checking — with Saudi numbers.
A market-sizing question asks for a rough number you don't know in advance, such as “How many cups of coffee are sold in Riyadh each day?”. The method matters more than precision.
Two approaches
- Top-down: start from the population, then narrow (who drinks coffee, how often).
- Bottom-up: start from one unit (a café), then multiply by how many there are.
Key takeaways
- Method over precision.
- Pick top-down or bottom-up, and say why.
- Sense-check the number at the end.
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Practise it: Market Sizing
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