Hello geruka, custom size costume doesn't charge extra cost, but the processing time will be longer than standard size costumes; for this costume in custom size, we need about extra 1-2 weeks to make it (excluding the shipping time).
And the price is in USD, when you pay by different currency cards, the amount will exchange to your credit cards currency automatically. n_n
**The actual exchange rate is adjusted by the payment gateway, and the rate is similar to market exchange rate, no extra cost will be charged.