For photo enthusiasts everywhere, the A4 envelope (4-1/4” x 6-1/4”) is just what you’re looking for. At Action Envelope, we know you love sharing pictures with family and friends – that’s why we’ve designed this custom-sized envelope, offering the perfect fit for your 4 x 6 photos! Manufactured exclusively by Action Envelope, the A4 is ideal for social/invitational purposes.