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.