Material: These envelopes with gold border are made of 120gsm paper; thick and durable, with great sealing performance. Easy to write on them.Two Ways to Seal: 1. Wet the glue on the sealing area of envelope; Then fold the sealant and press and hold for a few seconds; 2. You can seal it with a sticker. If you just only need the things inside not to fall out, you can even just seal them with gold stickers!If you have any questions about our products, please in time and we will reply to you within 24 hours.Package: 100 pieces dark green #10 Envelopes and 100 pieces gold stickers;Size: 9 1/2 x 4 1/8 Inches; the letter envelopes are very suitable for letters, invoices mailing, birthdays, baby showers, invoice, holidays, etc.