Estimation question

What is the market size of toilet paper in Canada?

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What this question tests

Straightforward market-sizing estimation using population and per-capita consumption or spend assumptions.

Estimate Canada's population, about 38 million.
Estimate average annual toilet paper spend per household, given shared use, say roughly 15 million households at CAD 80-100 a year.
Multiply households by annual spend to get total market size in CAD.
Cross-check with a per-roll approach: average rolls per person per year times price per roll times population.
State the final market size as a range given the two approaches.

Uses two independent approaches, household spend and per-roll consumption, and cross-checks them for consistency.
States both population and household assumptions explicitly with round numbers.
Lands on a defensible order of magnitude, roughly CAD 1-1.5 billion, rather than a falsely precise figure.

Estimating from memory of a 'feels right' number without showing the population times spend calculation.
Confusing retail market size with manufacturer revenue, which differ due to retail markup.

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