Gifts under $60 are exempt
Products/Items under $20 are exempt
^ the first one is whether Customs will open your package or not. I had an order mailed from the US marked as $60 and a gift but was opened by them --> evaluated a price --> I had to pay customs which was 18% + any additional postage fees ($5?)
Although my packages don't tend to be open coming from Asia (Korea/Hong Kong- Japan is a different story) or if it's shipped with EMS.