We use the USPS as our shipping carrier. First Class Package for regular orders. Priority Mail for larger orders. They are reliable and accessible to everyone, everywhere. Shipping cost is based on package weight, size and distance.
Most the time (more than 90%) our shipping calculator get the shipping cost right. For large orders and international shipping, the calculation gets trickier as the size and the weight counts. When the shipping charge that we quote is more than $2 above net cost, we will issue a refund (for the shipping cost overcharge). Please note that shipping cost includes the actual shipping cost plus packaging and handling cost (about $0.75 to $2).
Anything in between, we always make sure to add suprise / bonus items for the difference.
Thank you for your continuing support to US small business.