Australia Post label sizes for Shopify: A6 thermal or A4
Short answer
Use A6 (100 × 150 mm) if you have a thermal label printer, because each label comes out ready to stick. Use A4 if you print on an office printer. In All In One Australia Post Ship, you can also reprint the same label in another size for free within 24 hours.
The right label size depends mostly on the printer you already own.
The three sizes
| Size | Printer | Best for |
|---|---|---|
| A6 (100 × 150 mm), one per sticker | Thermal label printer | Regular shipping, with no cutting or ink |
| A4, one per sheet | Any office printer | Occasional parcels |
| A4, four per sheet | Any office printer | Using plain or four-up label paper efficiently |
International labels can be A6 or A4, one per page.
Set your size
Choose your default under Printing in the app menu. To change the size for a single batch, use the Label size dropdown beside the Generate button.
Fix a label in the wrong size
Printed A4 on a label printer, or the other way round? You can get the same label in another size for free, within 24 hours of making it.
- Straight after generating: choose a size under Wrong size for your printer? in the label preview. The whole batch prints again.
- One order: on the Fulfilled tab, press the small arrow beside Download Label.
- Several orders: select them on the Fulfilled tab and press Download in Another Size.
Reprinting never charges you, never creates a new shipment and keeps the tracking number.
Common questions
Do international labels print on A6?
Yes. International labels can be A6 or A4, but not four per page.
Does reprinting in another size cost anything?
No. It doesn't create a new shipment, charge you again or change the tracking number.
What happens after 24 hours?
Australia Post refuses to print a label again after 24 hours, and the app tells you how long ago the label was made.