it can take 30 days. Must have air mail stamp. On average our packages cost $100-$125(3000thb) a medium size box. With 3 kids and 3 cities! We now do Amazon- much cheaper! But Thai post was the easiest!
We just arrived in Canada through Tokyo ( need proof of pcr-they take you aside to check) then we had to travel through USA. We filled out all the apps but seriously- print all your paperwork!!!!! Canada did not want a pre-test but for peace of mind! Glad we did it! Plus.. you may be asked for random test after customs.