Tanzania is approximately 947,300 sq km, while Mali is approximately 1,240,192 sq km, making Mali 31% larger than Tanzania. Meanwhile, the population of Tanzania is ~58.6 million people (39.0 million fewer people live in Mali).
This to-scale map shows a size comparison of Tanzania compared to Mali. For more details, see an in-depth quality of life comparison of Mali vs. Tanzania using our country comparison tool.