Are you looking for a high-quality A4 envelope for invitations, announcements, greeting cards, and more? These envelopes are also perfect for any occasion from playful to formal. The modern square back flap adds a sophisticated touch to this envelope. Best of all, it features a moistenable glue sealing method on the flap! Simply lick the glue or use a moistener and press down to seal your envelopes. You'll get a great seal every time. The 80 lb. text-weight envelopes are an excellent choice because they're about twice as thick as regular printer paper. This sturdy and durable thickness is perfect for shipping long distances without bending or tearing. When printed on, LUX envelopes are complemented with a wide variety of ink colors. You won't have to worry about paper jams, tears, or ink smears with these envelopes. They're designed for compatibility with laser and inkjet home printers. These envelopes are also ideal for addressing notes and invitations by hand. Whether you use a gel pen or calligraphy pens, you'll be impressed with the high-quality, smudge-proof paper. These A4 invitation envelopes measure 4.25” x 6.25” (121mm x 165mm). They can also fit inside of larger-sized envelopes or paper inside, including A6, A7, A8, A9, and A10. If you're in charge of envelopes for a wedding, party, holiday, corporate gathering, banquet, shower, birthday, or graduation, LUX 80 lb. Ruby Red envelopes are a durable and high-quality option for all your party-planning needs. Purchase a package of 50, 250, 500, or 1000 today!