A7 Envelopes - Light Yellow 70lb - 5 1/4 x 7 1/4 (for 5x7 cards) (pack of 100) Envelope Size: 5 1/4" x 7 1/4" Fits Card Sized: 5" x 7" 70lb paper weight (slightly heavier than standard envelopes) Square Flap (gummed)