A8 (5 1/2 x 8 1/8) Invitation Lined Envelopes 60#Surprise! There's a completely different color inside. Available in Red, Black, Silver and Gold – our LUX Lining Collection adds a special touch! The grooved lining extends to a quarter of an inch from the bottom of the envelope and is the perfect complement to your elegant design for weddings, holidays or party invitations.