Sudan dwarfs United States: about 1,863,027 km² km² against 9,439,424 km² km². At true size Sudan is about 5.1× larger — the whole of United States fits into Sudan roughly 5 times.
Sudan sits in Africa, United States in North America. On the old Mercator map the latitude gap distorted how large each felt beside the other; at true size the answer is simply 5.1×.
The old map muddied it further: Mercator inflates Sudan about 1.1× and United States about 2×, so on a Mercator-style map this pair appears 9.3× apart instead of the true 5.1×.
Sudan fits 5× into United States.