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Straight Flap Envelope Liners For Unique Lined Envelopes

Use our straight flap envelope liner inserts to create lined invitation envelopes that are truly unique. Lining your own square flap envelopes with LCI Paper's envelope liner paper is fast, convenient and economical.
So Many Straight Flap Envelope Liner Papers to Choose From
LCI Paper's drop-in envelope liners come in dozens of colors, several finishes, and in two popular sizes. Just choose your liner paper and order it blank or custom printed with your design. With the option to pair these liner papers with hundreds of different straight flap envelopes, the creative lined envelope possibilities are endless!
About Straight Flap Envelope Liner Paper Sizes A2 straight flap envelopes - select the 4 1/2 x 5 1/2 liner size
A7 straight flap envelopes - select the 6 x 6 3/4 liner size
About Straight Flap Envelope Liner Paper Fit Please note, LCI Paper envelope liners are pre-cut to fit in LCI Paper envelopes only. If you purchased envelopes elsewhere, our liners may not fit.  They are designed to align with the gum seal of the envelope and extend nearly to the bottom of the envelope, stopping approximately 1/8 inch - 1/4 inch from the bottom of the envelope.