Over the next three months, the Baltic country of Estonia will become about 8 inches taller. That’s because it’s decided to change how it measures heights above sea level, converting from an old Russian system to something called the European Vertical Reference System, reports the Postimees newspaper. The country’s highest point, Suur-Munamagi, which is essentially a big hill with a lookout point on top, will grow accordingly to become 1,041 feet above sea level, reports the BBC.
“The Baltic elevation system of 1977 is obsolete,” says Estonian Land Board official Tambet Tiits. “And then there’s the wish to be in one and the same system with Europe.” Most countries in Europe—including regional neighbors Latvia, Lithuania, and Finland—already use the European system, which references Amsterdam’s Ordnance Datum, reports ERR. Authorities expect a three-month transition period and will phase out the Russian system by the first day of 2018. Now, any construction projects that cross Estonia’s border will no longer have to be converted. (Estonians are the third tallest humans on the planet.)