Flat rate box benefits
Simplify shipping
Once purchased, flat rate boxes are ready to fill, address and ship.
No surprise costs
Postage is included in the cost. It isn’t based on destination or weight (up to 5 kg).
4 convenient sizes
Available in extra small, small, medium and large. Large is not available at all Canada Post locations but can be requested at the post office.
Environmentally friendly
Made with at least 60% recycled content and 25% post-consumer waste. 100% recyclable and printed using water-based inks. Shipped with carbon-neutral shipping.
What flat rate boxes include
- Prepaid postage
- Tracking and on-time delivery guarantee Footnote 1 across the country, varying by destination
- Up to $100 of liability coverage for loss or damage Footnote 2
- Carbon-neutral shipping Footnote 4
No additional features and options can be added such as additional liability, coverage or signature Footnote 3.

How to buy and ship a flat rate box
Box sizes and costs
Extra small | Small | Medium | Large | ||
---|---|---|---|---|---|
Dimensions: Length x Width x Height | 24.1 x 16.5 x 8.9 cm (9 ½ inches x 6 ½ inches x 3 ½ inches) | 35cm x 26 cm x 5cm (10 3/8 inches x 14 inches x 2 1/8 inches) | 39 cm x 26 cm x 12 cm (15 3/8 inches x 10 1/4 inches x 4 3/4 inches) | 40 cm x 30 cm x 19 cm (15 3/4 inches x 11 13/16 inches x 7 1/2 inches) | |
Max. weight | up to 5 kg | up to 5 kg | up to 5 kg | up to 5 kg | |
Price | $17.99 | $19.99 | $24.99 | $32.99 | |
Drop off location | Street letter box or post office | Street letter box or post office | Post office | Post office |