Your speakers are not particularly large, or heavy. Elizabeth and Photon46 have you covered nicely, and particularly the recommendation for a double box with 2 inches additional space between the two boxes. That is great advice. Many of the better manufacturers use similar packing.
Below are a couple of additional thoughts from someone who has shipped a lot of gear.
Do NOT use USPS...do not even be tempted by the lower price,
insure for full value and, as a hint,
Vladimir Lamm recommends only shipping his amplifiers via an air carrier and never by ground Lamm shipping recommendtions
Below are a couple of additional thoughts from someone who has shipped a lot of gear.
Do NOT use USPS...do not even be tempted by the lower price,
insure for full value and, as a hint,
Vladimir Lamm recommends only shipping his amplifiers via an air carrier and never by ground Lamm shipping recommendtions