What are the size and weight limits for sending letters to U.S. and international destinations?

Size and weight

To send an item to the U.S. or an international destination that qualifies for Letter-post rates, please meet the following specifications: 

Click to view table

Letter-post (U.S.A. and International) size and weight

Category Length

 

Width

 

Thickness

 

Weight

 

Standard

Standard
Envelope/Self-mailer

max.

245 mm

 

156 mm

 

5 mm

 

50 g

 

min.

140 mm

 

90 mm

 

0.18 mm

 

3 g

 

Cards or Postcards

max.

235 mm

 

120 mm

 

5 mm

 

50 g

 

min.

140 mm

 

90 mm

 

0.18 mm

 

3 g

 

Other (Non-standard and Oversize)
Envelope/Self-mailer/Card

max.

380 mm

 

270 mm

 

20 mm

 

500 g

 

min.

140 mm

 

90 mm

 

0.18 mm

 

10 g

 

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What if my mailing item is too heavy or too big to qualify as Letter-post?

It may qualify for one of our parcel services.

What is a self-mailer?

A self-mailer is a piece of mail (other than a card, postcard, magazine or catalogue) that does not have an outer cover, wrapping or envelope.

Want to mail an item within Canada?

Find specifications here.