18mm

(12) ECONOMICAL AND DISPOSABLE BOX CUTTING BLADES – Blade width is 18mm (0.71 Inches) Compact and lightweight with comfortable grip and wider retractable blade.
CUTTING WITH EASE – Ready to use, cut and toss or keep some around as a spare utility knife in your garage, tool kit, home and office.
18MM WIDER BLADE – Heavy Duty Ideal for Thicker Cuts. Use for commercial or industrial applications like thicker paper, tape, plastic, cardboard, balsa, bass wood, photos, coupons, cardstock, mat board, foam board, delicate fabrics, crafts, amazon, ups or post office packages.