Shipping is provided by United States Postal Service: Priority Mail Flat Rate Small Box.
 
Prices are approximate and may change based upon actual USPS cost.

Rates:  
   Ground Small Envelope Items:
   U.S. Domestic        $4.50
 
For Purchases less than ~1lb

   U.S. Domestic      $10.56
   Canada              $27.90
   International         $41.95

For Purchases greater than ~2lb

   U.S. Domestic      $18.72
   Canada              $51.55
   International         $81.95