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1.
A unit of measurement.

Wales has, for decades, been used in the UK as a standard of measurement, not just of land mass but also of population, annual rain fall, tourist numbers and exports. After entering the European Union, British switched to the Belgium, on the whole, to using metric units of measurement.

The 'Belgium' is the European standard of measurement now. It has almost completely eliminated the usage of the 'Wales' in this respect. Belgium is about 1½ times the size of Wales, approximately 30,000 km2.
Belgium is roughly the size of The Belgium.

An area of Amazon rainforest the size of Belgium has been hacked down in one year.
by freddie1980 May 03, 2010