Take one fully-assembled invite to the post office for an official weight in order to purchase the correct postage. The post master will let you know postage required to mail your invitation. They will check for thickness and weight. Be prepare for the postage to be more than a single forever stamp. 

Besides weight, additional postage is required for thick envelopes, square envelopes, non-machinable, hand canceled, and outside adornments like wax seals. We recommend hand-canceling your invites so that they don’t get marred by the post office’s cancelling machines. 

Another area to be aware of is how rigid is the envelope. If the envelope, once fully assembled, has little to no flex when you try to bend it, there is a real possibility that it will not go through the sorting machines well, and they will damage the envelopes. The post office doesn’t always check for this, so we recommend you ask them. Overall, you want to protect your investment, so don’t skimp when it comes to mailing. Once the stationery is in the possession of the post office, we no longer have control over the condition of the envelopes and are not responsible for damage that occurs in transit.  

Our envelopes are not like the ones you are used to. They are not mass produced and the glue to seal the envelope that activates when moistened is of a different variety than commercial envelopes. The preferred way to seal our envelopes is to use double-stick tape. You can find this in most craft stores or online. Run the tape right over the top of the gummed area on the flap. The other way to seal them is to moisten the flap. This method may not activate the glue immediately. We recommend using a sponge applicator or Q-tip with water, then pressing and holding the flap firmly shut until the glue activates, about 10 seconds. Place a heavy book or weight on the envelope to hold them shut until they dry. This will minimize warping that the water may cause. 

Dark paper colors and inks can rub in the mail putting marks on lighter colored paper in the suite. We recommend protecting your stationery with tissue paper. We do sell tissue on our sister site marsupialpapers.com. The tissue paper is a small price to make sure your invitations arrive as you intended and ensures that the dark colors won’t mark up the lighter colors.