New Jersey is the closest size to Wales. Wales is 8,022 Square Miles, while New Jersey is 8,729 Square Miles (still a big difference)
The country of Wales, part of the United Kingdom, is closest in size to the US state of New Jersey. (Wales: 8,022, sq miles, New Jersey 8,721 sq. miles.)
Texas.
Florida
Ohio
new hampshire
rhode island
The combined size of the US states of Texas and California.
Colorado.
West Virginia
West Virginia is the US state that is roughly the same size as Taiwan. Both are around 14,000 square miles in area.
C.A.R. is approximately 622,980 km. The closest US state to that size is Texas which is 692,200 km. (The next largest US state, California, is 411,500 km.)
The state of Maryland in the United States is approximately the same size as Belgium. Both regions are around 12,000 square miles in area.