Standard Letter Size Envelope Postage. 260 x 360 x 20mm. If it is 2.1 ounces, use 3 ounce price).
The envelope and contents must also weigh under 100g. Different size & weight restrictions apply to seasonal greeting cards, valid for postage between 1 november and 31 december. Remember settings you've applied (such as layout, text size, preferences and colours) remember selections you have made (such as search functions and results, and goods and services) apply customised content segments to individual users;
If it is 2.1 ounces, use 3 ounce price).
View our letter service rates. 11 1/2 x 6 1/8 (the maximum thickness of a regular envelope is 1/4) if your letter weighs more than 1 ounce, then it will cost more. Ideal for mailing greeting cards, regular letters and postcards, the maximum size that would fall under a 'letter' is 165 mm x 240 mm. What is the weight of your mail piece?