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Finland is a member of the European Union, so it--like many other European countries--use the common currency, the euro.  Currently I believe 1 euro is worth around $1.30. So along with the higher cost of living, the exchange rate makes things a bit more expensive for me. Above is a picture of the different bills/coins of the euro. Uniquely, the 1 and 2 euro denominations are coins, leaving only 5 and higher for bills. 

Another unique thing with money Finland (and Spain as well) is that tax is already factored into the listing price. Therefore, if a price tag on a shirt says 15 euros, then at the register you pay exactly that. The same goes for restaurants,  cafes, bus fares, etc. I find it very convenient, there is no guess work on how much you end up paying.