Do you need an inner envelope for wedding invitations?

Inner envelopes are not expected in the UK. Most couples use one outer envelope, addressed clearly, and that is all you need. The inner envelope traditionally held the invitation and protected it, but modern printing and sturdy card mean this is rarely necessary. If you love the layered look, you can add one, but it will increase weight and postage cost. For a UK wedding, keep it simple: one envelope, properly addressed, with the guest's name and address on the front. If you are sending to a family, address it to the adults by name, and you can mention children on a separate line or on the invitation itself. Remember to include a return address on the back flap, in case anything goes astray. This is practical and kind, especially if a guest has moved recently. You can also use a nice liner inside the single envelope for a touch of colour without the extra weight.