Flat rate boxes

A woman packs a wrapped present into a flat rate box from Canada Post.A woman packs a wrapped present into a flat rate box from Canada Post.A woman packs a wrapped present into a flat rate box from Canada Post.

Flat rate boxes make shipping easy

Buy flat rate boxes at any Canada Post location to send your item(s) anywhere in Canada with ease. As long as it doesn’t weigh over 5 kg, if it fits, it ships.
Flat rate boxes can be purchased online in packs of 12 only and shipped to you. Buy flat rate boxes.

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.

A man uses an automated parcel drop box at a post office to mail a Canada Post flat rate box.

How to buy and ship a flat rate box

Box sizes and costs

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