Wax seals on wedding invitations is a classic. It's always lovely, pretty, and really rich looking. The main reason I usually don't do wax seals is because it can add cost to postage, but if a bride and groom are willing to take that hit, it's really such a lovely finishing touch to any wedding invitation. There used to be a time when you could only get very ornate letters, but recently, more and more options have become available for creative seals that fit perfectly into the look and feel of your wedding. So if you're willing to pay for extra shipping, I vote yes to wax seals!