S=6 1/2 x 4 3/4 Inches,M=5.24 x 7.24 Inches.This package includes 100 A7 envelopes measuring 5.24 x 7.24 inches, made from 110gsm paper with moderate thickness that resists tearing. These envelopes are designed for 5x7 wedding, birthday, shower, and graduation party invitations. To seal, simply wet the glue on the sealing area, fold the sealant, and hold for about one minute. Suitable for various occasions including invitations, greeting cards, business cards, and personal mail. Weight: 1.43 pounds.