These envelopes are made of tracing paper material, and lightweight. These envelopes are great for mailing private or business-related documents, card, brochures, and more. They protect your documents from damage or dropping. Features -Color:White -Material:Tracing paper -Size(Unfold):26.80X18.00X0.10cm/10.53X7.07X0.04in -Size(Fold):18.00X12.90X0.10cm/7.07X5.07X0.04in - Always useful for birthdays, weddings, parties, holidays, corporate events, banquets, and showers. - Great for mailing holiday cards, greeting cards, invitations, announcements, cards, photos, letters, statements, personal mail and direct mail. - The product is manufactured with good material for safe and practical use. - Help you express your emotion and blessings in a traditional way to your friends and family. - The product will be a good helper soon when you need to take advantage of them for a long time in one way. Package list: 150 x Envelopes