Burgundy A7 (5-1/4-x-7-1/4) Quality Envelopes 250-pk - 104 GSM (28/70lb Text) PaperPapers 5X7 Invitation, Card and DIY Greeting Envelopes Burgundy Invitation/Announcement Envelopes made from quality text papers: 104 GSM (28/70lb Text) Square flap - Moisten to seal A7 Envelope dimensions: 5-1/4-x-7-1/4-inch / 133x184 Millimeters Insert must be smaller than envelope dimensions. This is an ideal size to hold 5X7 cards.