LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) are perfect for Invitations/Announcements/Sending Cards/5x7 Photos, sold as 500 per box.Comes in Holiday Red Sparkle.Sold as 500 per box.Dimensions: 5 1/4 x 7 1/4.LUX A7 Invitation Envelopes (5 1/4 x 7 1/4) are perfect for Invitations, Announcements, Sending Cards, 5x7 Photos and so much more!.A7 Invitation Envelopes (5 1/4 x 7 1/4) in Holiday Red Sparkle are lustrous, sparkling red colored envelopes that looks like glitter but have a smooth finish. These envelopes have an elegant square back flap and are ideal for invitations, social mailings, holiday cards, greeting cards and more. Sealing these envelopes is made easy by a Peel & Press strip located on the inside of the back flap. A7 envelopes are perfect for holding A7 flat and folded cards. You can also use the A7 size as an outer envelope for invitations, as smaller A sized envelopes (A6, A4, A2, A1) fit inside. Constructed from high-quality, durable 90lb. Holiday Red Sparkle paper stock. Available plain or printed for customization, branding and creative uses, starting in small quantities of 50 to large quantities of 50,000 and more.