Poland is approximately 312,685 sq km, while Sierra Leone is approximately 71,740 sq km, making Sierra Leone 22.94% the size of Poland. Meanwhile, the population of Poland is ~38.3 million people (31.7 million fewer people live in Sierra Leone).
This to-scale map shows a size comparison of Poland compared to Sierra Leone. For more details, see an in-depth quality of life comparison of Sierra Leone vs. Poland using our country comparison tool.