Also question is, how do I make an A4 envelope bigger?
Regarding this, how do you write on an envelope?
Thereof, how much does an envelope cost?
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| Post Office/Retail Rates | ||
|---|---|---|
| Letters | 2021 Postage Rates | 2020 Postage Rates* |
| First-Class Mail letter (1 oz.) | $0.58 | $0.55 |
| First-Class Mail letter – each additional ounce | $0.20 | $0.15 |
| First-Class Mail Flat/Large Envelope (1 oz.) | $1.16 | $1.00 |