What is the standard interior door size in Russia and Europe?

In Russia the common interior door leaf is 2000 mm high, with 600, 700, 800 and 900 mm widths, and 400 mm or 800 mm bathroom formats; 2100 mm is also widely used. European practice centres on 1985 × 610/735/860 mm. We produce both metric standards and will match your existing opening exactly — important in older buildings where settling has made openings non-square.