Pennsylvania is about 203 times bigger than Isle of Man.

Isle of Man is approximately 572 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 20,193% larger than Isle of Man. Meanwhile, the population of Isle of Man is ~91,382 people (12.6 million more people live in Pennsylvania).
Tip: This to-scale comparison of Isle of Man vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles.