It won't be too bad if you find a box they fit in and send to me Parcel Post because you're just in California. Shouldn't be much more than $5-something.
If I bid and win, couldn't your yarn fit in a Priority Legal Size Envelope that costs $5.35 at the P.O. or $5.10 if you make out the label online through USPS?
yeah they are on the bigger side. might have to stuff them into a flat rate box. will visit the PO today or tomorrow to ship another item. ill look at everything while im there.