Standard size mail Items such as letter envelopes, postcards and standard cards. Weight Price Up to 30 g Up to 5 sheets of paper* $1.07 for a single stamp or $0.92/stamp in a booklet Over 30 g up to 50 g Up to 9 sheets of paper* $1.30 Non-standard and oversize mail Items such as large documents, oversize envelopes and heavy cards. Weight Price Up to 100 g Up to 20 sheets of paper* $1.94 Over 100 g up to 200 g Up to 40 sheets of paper* $3.19 Over 200 g up to 300 g Up to 60 sheets of paper* $4.44 Over 300 g up to 400 g Up to 80 sheets of paper* $5.09 Over 400 g up to 500 g Up to 100 sheets of paper* $5.47 If your letter exceeds 500 g, you will have to use our parcel services. Sending your mail Buy stamps online Use postage stamps to send letters, cards and other light-weight papers. Pricing is based on the destination, weight and size of your item. Save money when you buy booklets or coils of stamps. Buy stamps PERMANENTTM stamps PERMANENT stamps are identified with the letter P instead of a value. They’re always accepted at the current domestic postage rate. If you have a PERMANENT stamp, you can use it at any time now or in the future, even if the rates have increased. More on PERMANENT stamps How to use old postage You can still use older domestic stamps that display values instead of the letter P that PERMANENT stamps display. If the added value of your stamps is equal to or greater than the current stamp rate, you can use them to send your mail.