1QUESTION 1 OF 3
Answer & explanation
The official answer, with Fermi’s reasoning step by step.
Answer & explanation
Official answer
129,000,000
pairs
How to estimate it
Fermi’s official “Napkin math”
Start with everyone on Earth, about 8 billion people. How many buy a pair of Crocs in a year? Most never will, but kids outgrow them fast. Maybe 1 in 50.
- World population
- 8,000,000,000
- Buy a pair this year
- ≈ 1 in 50
- 8B ÷ 50
- ≈ 160,000,000
Rounded assumptions may give a slightly different estimate. The official answer above is the game’s reference value.
Source calculation & reference
- Crocs Brand footwear unit sales, 2025 (Crocs, Inc. Form 10-K)
- 128,938,000 pairs
- Cross-check: Crocs Brand revenue ÷ average selling price, $3,325.8M ÷ $25.40
- ≈ 131,000,000
- Rounded
- ≈ 129,000,000 pairs
Reference cited by Fermi: Crocs, Inc. Form 10-K for 2025: Crocs Brand footwear unit sales of 128.9 million pairs
How close was your guess?
Your comparison will appear here.
Compare by ratio: divide the larger number by the smaller one. The closer to 1×, the better.