A2 Envelopes - Bright Blue - 4 3/8 x 5 3/4 (for A2 cards) (pack of 50) Envelope Size: 4 3/8" x 5 3/4" Fits Card Sized: 4 1/4" x 5 1/2" 60lb paper weight (standard envelopes) Square Flap (gummed) similar to turquoise