First Class flat-rate shipping small items:
United States - $4
Canada - $9
International - $13
Priority flat-rate shipping orders containing books, prints, or t-shirts . Orders with a keepsake box will be shipped parcel post:
United States - $8
Canada - $22
International - $26
If your order is made up entirely of small items (dog tags, buttons, postcards, bookmarks, tins, stickers) you would get the small item shipping rate for ANY amount of small items. If you lived in the US and ordered one button you'd pay $4 shipping for it: If you ordered 10 buttons, a bookmark, and a postcard, you'd still pay $4. It's a flat rate.
Let's say that order contains a t-shirt, 5 postcards, 5 buttons, and a print and you live in the US. You'd end up paying $8 to ship everything. If you just order one t-shirt, the shipping rate is still $8. If you order a t-shirt and a book, the shipping rate is still $8.