Triplast 100 x C5 White Self Seal Security Envelopes (Size: 229x164mm) | Fully Opaque, Self Sealing & Printer Safe Mailing Paper Envelopes | Ideal for Everyday Home, Office & Commercial UseCONTENTS: Pack of 100 White Plain Mailing Envelopes SIZE: C5 LENGTH: 229 mm 9. 02 in WIDTH: 164mm 6. 46 in THICKNESS: 90 gsm MADE in the UK ENHANCED SECURITY: These envelopes feature a blue high security pattern on the inside that scrambles text to ensure contents remain concealed when in transit or storage. Send confidential documents with total confidence & peace of mind! HASSLE FREE & PRACTICAL: The self seal adhesive eliminates the need for any