I bought this about 5 years ago. I used it as a mother bag three times, but it felt too big and heavy for my body (female), and I haven't used it since. It has many pockets and can hold a lot of luggage. It's very durable. It has been stored at home, so please consider it only if you understand that it is used. Approximately 52 cm tall, 30 cm wide, and 17 cm deep. I think it can be used for commuting to school or for mountain climbing.