The most important information besides the cost of the goods is the Country of Origin of the t-shirts and the requirements for documents for the country that is importing the t-shirts. Under $2500 there is usually a commercial invoice, up to 4 copies, the Airbill and sometimes a Certificate of Origin.
Here is a list of some of the general types of documents that may be necessary for importing a typical $1000 order.
Pro Forma Invoice
Certificate of Origin
Destination Control Statement
Harmonized code for the product 610990
Electronic Export Information (EEI) Formerly Known As Shipper's Export Declaration (SED)
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