Here is a link to the Canada Duty CalculatorSome shipments such as blanks will require a customs broker to clear your produts across the border. Here are a few brokers to contact for info:http://www.shipnorthamerica.com/htmfiles/brokerage.htmhttp://www.aacb.com/http://www.pcb.ca/Small shipments with USPS do not require a broker.