Pennsylvania is about 1,001 times bigger than Jersey.

Jersey is approximately 116 sq km, while Pennsylvania is approximately 116,075 sq km, making Pennsylvania 99,965% larger than Jersey. Meanwhile, the population of Jersey is ~102,146 people (12.6 million more people live in Pennsylvania).
Tip: This to-scale comparison of Jersey vs. Pennsylvania uses the Mercator projection, which distorts the size of regions near the poles.