Shopping cart shipping estimates are not correct - the following rates apply regardless of what the cart estimates.  Your card will not be charged till I ship.  Paypal overpayments are refunded.

The shopping cart is a free one and has some limitations. Calculating the shipping cost is one of those limitations. The cart cannot determine that I can ship 6 lbs of clay in an envelope for $6.50 but can only ship 3 lbs of Alley Goop for the same price. All it can do is add the total units for each item and come up with an Estimate. I guarantee you that I do ship your items to you in the best way possible.

Flat Rate shipping on most orders of either $6.75 or $13.00 depending on box, (or shipping cost could be between the two stated). 

International flat rate of $18.50 for envelopes under 4 lbs, $49.50 from 4 lbs to 20 lbs.