[Height] Approximately 35cm to 40cm * The vertical length can be extended by about 5cm by releasing the Velcro on the top. [Width] Approximately 10cm [Depth] Approximately 1.5cm "Randoseru Side Pouch" for storing bulky, long items by inserting it on the side of a school bag. ・ Easily carry long items such as recorders and 30cm rulers. ・ The opening is zippered. The mouth opens wide, making it easy to take things out! ・ The fabric surface uses water-repellent fabric to protect the contents from rain and dirt. ・ It can be inserted into the side belt of the school bag, and the lower belt can be attached to the shoulder belt for secure fixation, so it doesn't swing around and is comfortable. ・ Reflective panel for safety at night. Made of nylon, it can also be used as a folding umbrella holder.