In reply to ekinstimothy:
Slow shipments will be by boat, obviously depends on destination but US is likely to be 4-6 weeks on the water, plus clearing customs and shipping by land at either end.
However for a relatively small and light consignment (which this is) you won't be paying too much more for air freight. Just ring round couriers asking for quotes (although personally I'd avoid DHL or DPD).
Make sure you provide all the documents required to clear customs (usually five copies!) on the outside of your package. Delays and extra costs because you fail to do this will be your problem not the couriers.
Post edited at 13:34