United Kingdom covers 239,616 km² km² on the new Equal Earth world map — 0.2%% of all land on Earth, making it the 80th largest country in the world and the 11th largest in Europe. At 54° latitude the old Mercator map inflates area by about 2.9×, so it drew United Kingdom closer to 694,886 km² km² — a difference of roughly 190%%.
For scale: United Kingdom is roughly the same size as Ecuador (255,658 km² km²).
You could fit 3 of Czechia inside United Kingdom.