It's about as big as Mississippi.
It's about one-and-one-tenth times as big as Pennsylvania.
In other words, 12,543,360 hectares is 1.051567 times the size of Pennsylvania, and the size of Pennsylvania is 0.95096180 times that amount.(formally the Commonwealth of Pennsylvania) (United States)
The "Keystone State," Pennsylvania measures 11,928,250 hectares. Although Philadelphia is home to one of the nation's busiest seaports (by amount of container traffic), the state of Pennsylvania has just 92 km (57 mi) of coastline along the Delaware Estuary and no coastline on the Atlantic ocean.
It's about nine-tenths as big as Louisiana.
In other words, 12,543,360 hectares is 0.93422970 times the size of Louisiana, and the size of Louisiana is 1.070401 times that amount.(United States)
The "Pelican State" or the "Bayou State," Louisiana measures 13,426,420 hectares in total area. Louisiana boasts a total of 6,400 km of navigable waterways made up of its numerous rivers and streams — the most of any state in the nation.
It's about one-and-one-tenth times as big as Ohio.
In other words, 12,543,360 hectares is 1.08043 times the size of Ohio, and the size of Ohio is 0.9255570 times that amount.(United States)
The "Buckeye State," Ohio measures 11,609,600 hectares in total area. The 121,000 hectares region in the northern part of the state known as the "Toledo Strip" is a once-disputed region that was the impetus for an 1835 boundary conflict between Ohio and Michigan known as the "Toledo War."
It's about nine-tenths as big as Alabama.
It's about nine-tenths as big as Arkansas.
In other words, 12,543,360 hectares is 0.91070840 times the size of Arkansas, and the size of Arkansas is 1.098046 times that amount.(United States)
The "Natural State," Arkansas measures 13,773,190 hectares in total area. The 370 hectares state park called Crater of Diamonds is situated over an eroded lamproite volcanic formation and is the only state in the Union where diamonds are mined (although commercial mining was ceased in 2002).
It's about nine-tenths as big as North Carolina.
In other words, 12,543,360 hectares is 0.89987970 times the size of North Carolina, and the size of North Carolina is 1.111260 times that amount.(United States)
The "Tar Heel State," North Carolina measures 13,938,930 hectares in total area. The Outer Banks, a 32,000 hectares region off the northeastern coast of the state's mainland, is a series of barrier islands that has been called the "Graveyard of the Atlantic" on account of the numerous shipwrecks that have occurred there.