We needed to choose a single currency for our boutique's business platform and we elected to use the US Dollar ($) because we have customers all over the globe and not only in Europe. To help customers around the world, our online boutique uses a currency converter widget on all product listings to approximate the cost in local currencies (EUR, GBP, AUD, CAD etc, but when you proceed to the checkout page, the total will be displayed in USD.
Don't worry though, its very easy to check out. Your credit card or Paypal will automatically convert your local currency into USD. The USD price will be exactly what is shown at checkout but the amount on your bank statement in your local currency may vary slightly from the approximate rates shown on product pages on our site because banks/Paypal use their own rates for currency conversion and this can vary slightly from the widget that our boutique uses. Its usually 1-2% lower or higher