postal envelope sizes

See which mail size applies to your item Pay the right amount for your postage. Our postage pricing for letters is based primarily on the size and weight of your letter. Check out our standard and oversize dimensions below. Weight and size overview There are two main categories of letter mail weights and sizes to help determine how much it will cost to send your item. Minimum dimensions for all items are 140 mm x 90 mm (5.5 inches x 3.5 inches). Standard (50 g or less) Use a single stamp for items that are within the standard weight and size range. Maximum dimensions The maximum dimensions are 245 mm x 156 mm (9.6 inches x 6.1 inches). However, the maximum dimensions for cards and postcards to the U.S.A. or an International destination are 235 mm x 120 mm (9.2 inches x 4.7 inches). Non-standard and oversize (0-500 g) Oversize or non-standard size envelopes and postcards will cost you more in postage. Maximum dimensions 380 mm x 270 mm (15 inches x 10.6 inches) If your letter is larger than the maximum dimensions above you’ll need to use our parcel services. Check out our size and weight limits for letters and documents sent in Canada and U.S.A. and International. Find out how to send a parcel Find your postage rate Use your mail weight, size and destination to see how much it will cost to send your item. See postage rates Tips for sending special occasion mailings These tips can help you smoothly send a large amount of mail, such as wedding invitations and other special occasion mail. Personalize your mail for your special occasion Create one-of-a-kind stamps, cards and postcards based on your favourite photos or designs. It’s easy to do online or on our app. Order custom postage Calculate your mail weight and size Measure a sample item to find out how much postage to use. The most affordable option is to send standard size items weighing up to 50 g. See letter sizing Buy stamps in batches You can buy stamps in various volumes, such as booklets and rolls. Save money by ordering in batches! Leave 6-8 days for your order to arrive. Shop for stamps Support How to address letters and parcels What items can’t be sent through the mail Why mail is returned to sender Useful links Calculate postage rates quickly Get the cost of sending a parcel or letter with our rate calculator. See and compare postage prices in Canada and around the world. Find a rate Get more with Registered Mail Get more features with Registered MailTM. It includes tracking, insurance and arrival confirmation with a signature. Register your mail Send one-of-a-kind mail Get creative with your mail! Use your favourite photos or designs to create personalized stamps, cards and postcards with our app or online. Design your own mail News and stories At home Write to Santa and receive a letter back from him! Read our blog Magazine Understanding postal codes Read our blog Magazine Canada 150 stamps celebrate the Paralympic and Olympic spirit Read our blog