Spain is approximately 505,370 sq km, while South Africa is approximately 1,219,090 sq km, making South Africa 141% larger than Spain. Meanwhile, the population of Spain is ~50.0 million people (6.4 million more people live in South Africa).
This to-scale map shows a size comparison of Spain compared to South Africa. For more details, see an in-depth quality of life comparison of South Africa vs. Spain using our country comparison tool.