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File photo / NZ Herald. The cost of postage is set to rise in July, New Zealand Post says. The standard letter rate, which is the cost of sending a medium-sized letter by standard post in New Zealand, is set to increase from 70 cents to 80 cents.Sending larger letters would also cost more, increasing from $1.40 to $1.60.epending on the size of the parcel and whether it was self-wrapped or in a New Zealand Post postage bag, people would be paying between 10 cents and $1 more. Meanwhile, premium letter services, which is Fast Post and Box Link, would not change in cost, New Zealand Post said.
And the price of a first class (1) ounce letter sent through the United States Post Office remains at $0.49 for letters mailed within the United States. The fee will continue to apply and extend for some indeterminate period of time.ny extra ounce(s) are subject to a fee of $0.22 per added ounce as of May 31st, 2015 (previously $0.21 per oz). Another prior rise in rates occurred January 27, 2013 when the price of a first class letter sent through the United States Post Office went up $0.01 to $0.46.