Maximum 25 x 35.3 x 3 cm
Letters are delivered to recipients within 4 days. Ordinary letters do not have item IDs so they cannot be tracked in Item Tracking.
Domestic no-value indicator stamp and first-class and second-class no-value indicator stamps can be used as such to mail domestic letters (max. 50 g).
If you send more than 10 letters per week, you should become a Posti contract customer. As a contract customer, you get business IDs for services and subscription channels.