FORMAT: C6-114x162mm. It can contain an A4 sheet (210x297 mm) folded into 4. CHARACTERISTICS: envelope without window. Its interior is printed in gray to ensure the confidentiality of your mail. CLOSURE: Self-adhesive, the glue is protected by a silicone strip, ensuring an effective and durable seal. PACKAGING: Wrapped in film by 25 envelopes. Perfectly suitable for individuals. CLAIREFONTAINE PAPER 90g/m2: A superior touch and guarantee of great whiteness. FSC certified to ensure sustainable forest management. Made in France in our factory in the heart of the Vosges.