We use USPS First Class Mail or Priority Mail for most orders. The pricing is calculated using USPS-provided shipping price tables. Prices were updated on January 17th, 2016, and our tables were updated to the best of our abilities. Sometimes our estimates may be a little off from the actual shipping cost, due to updated pricing or inaccurate weights. If the estimated shipping cost is more than $2 over the actual shipping cost, we will issue a refund for the difference. If you feel that the shipping estimate is inaccurate, please feel free to contact us, and we'll do our best to provide a personalized accurate estimate. Regrettably, shipping costs through the USPS have increased significantly in the last year. The best way to save money is to buy more than one item at a time, since shipping costs are calculated in 8oz increments and most items weigh 4 or less ounces.