■ Approximately 8.4 x 11.8 inches (213 x 300 mm): Approximately 0.2 inches (3 mm) larger than A4 size, and a thickness of about 0.73 - 0.75 mm. When you send an A4 paper in an envelope, or something else...do you worry about the edges of your A4 paper will be bent or scratched? This A4 protective paper (reinforcement product) allows you to ship documents and other items (A4 size paper) with peace of mind. Use as a protective material, buffer material, packing material, protective material, and reinforcing material on important A4 size paper. ■ Uses an N white S ball or NS ball with Japanese paper ■ Size: Approx. 8.4 x 11.8 inches (213 x 300 mm). ■ Thickness: Approx. 0.73 - 0.75 mm). ■ Color: Front: White (white), Back → Gray (gray).