Perfect A3 Fit: Measuring exactly 16 x 12 inches (40.5 x 30.5 cm), these envelopes easily accommodate large A3 documents without bending or folding.   Moisture-Resistant & Waterproof: The durable outer lamination acts as a protective shield against rain, moisture, and accidental spills during transit.   Heavy-Duty 90 GSM Quality: Made from thick, premium 90 GSM paper to prevent tearing, puncturing, and wear-and-tear.  Highly Visible & Professional: The classic yellow color ensures high visibility for couriers and presents a clean, professional look for your business correspondence.   Bulk Value Pack: Includes 250 units (packed in sets of 50 in poly packs for easy storage), ensuring your office or mailroom stays fully stocked.