Columbian CO598 Grip-Seal Invitation/Greeting Card Envelopes A2, 4-3/8" x 5-3/4" - White (Box of 100) Envelope is designed for computer generated invitations, greeting cards, announcements and more. Sized to hold an 8-1/2" x 11" sheet folded in quarters. Convenient and secure self-sealing Grip-Seal closure. Simply peel off release strip and press down for a quick, secure seal. Premium 24lb white wove stock. 4-3/8" x 5-3/4" 100 envelopes Envelope is designed for computer generated invitations, greeting cards, announcements and more. Convenient and secure self-sealing Grip-Seal closure. Simply peel off release strip and press down for a quick, secure seal. Sized to hold an 8-1/2" x 11" sheet folded in quarters. 4-3/8 x 5-3/4 Inches (size A2). 100 envelopes Premium 24lb white wove stock.