The gusset is approximately 3.5 inches (9 cm) long, yet it can hold a lot of materials and documents. Great storage capacity when carrying too much luggage or going outside. The interior of the main unit is designed to be easy to see and organize such as a zipper pocket, pen holder, open pocket, and divider. The open pocket on the back makes it easy to take out the documents and documents you want quickly. ◆ Simple and easy to use briefcase. Pursues ease of use and functionality for work such as pocket groups. Compatible with A4 files, perfect for storing business essentials. A reliable companion for active businessmen. A reliable and reliable product made in Toyooka City, Hyogo Prefecture. - Product details: Size: Width 15.4 x Height 11.4 x Thickness 3.5 inches (32.3 x 24.0 cm); Compatible size: A4 file (12.3 x 24.0 cm); Weight: Approx. 33.8 oz (960 g); Material: Nylon, Accessory material: Lightweight synthetic leather; Inner material: Cotton, Color: 01 - Black; Made in Japan; Made in Japan; Made in Japan; Zipper pocket 4 x Pockets, Pen Shoulder belt with inserts, dividers, others, studs, and shoulder inserts *Product design and specifications may change without prior notice. Thank you for your understanding.