French international postage rates at a glance. Inland domestic postage within France-as from 1st January 2015. There are THREE rates for letters up to 250 grammes, and two for letters up to 3 kg.
Mailbox Height. Mailbox height is important-the mailbox will need to be on a post that places the opening of the box between 41 and 45 inches from the surface of the road (not the ground where you will be inserting the post), and no more than 6 to 8 inches from the curb.
To be eligible for mailing at the price for letters: Must be rectangular. A minimum of 3.5 inches in height by 5 inches in length and at least .007 inches thick. A maximum of 6.125 inches in height by 11.5 inches in length and .25 inches thick. Not more than 3.5 ounces (First-Class Mail letter-size pieces over 3.5 ounces pay flat-size prices.