Stamp Cost 2024 Australian Open. Ordinary large letters up to 125g with a stamp would. 30 cents, from $1.20 to $1.50,.

Under the changes, the price of australia post’s ordinary small letter stamps will increase from $1.20 to $1.50. For instance, a recent price hike saw the basic postage rate go up by 25%, raising the cost of sending a standard letter from $1.20 to $1.50.