Keep large documents, files, certificates, artwork, and portfolios neatly organized with these 16 × 12 inch white envelopes, made from durable 90 GSM paper. The extra-large A3-size format provides ample space for storing and mailing documents without excessive folding, making them ideal for professional and everyday use. The sturdy paper construction offers reliable protection against dust, scratches, and minor handling damage, while the clean white finish gives a professional appearance. With 250 pieces per pack, these portfolio covers are suitable for offices, schools, businesses, institutions, studios, and bulk document storage or mailing requirements.