French Polynesia is approximately 4,167 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 7,848% larger than French Polynesia. Meanwhile, the population of French Polynesia is ~295,121 people (98.4 million more people live in Vietnam).
This to-scale map shows a size comparison of French Polynesia compared to Vietnam. For more details, see an in-depth quality of life comparison of Vietnam vs. French Polynesia using our country comparison tool.