The carriage costs depend upon the weight of the item. If you place an order online, the carriage cost will be shown immediately after the 'Shipping Address' page (but before you've committed yourself to paying):
http://www.torrid.com/services/international_faq.asp?LS= 0&
Remember that the postman will probably demand some payment from you when he delivers the item. This will be made up of any tax or duty which is specific to that item (if any) + 17.5% VAT + a Post Office fee for customs clearance.
Chris