Size (cm): Approximately H37 x W25 x D11 I think it's about 12 liters. I bought it about 4 years ago for around 4000 yen. I used to take it on elementary school field trips and social studies excursions. It's the perfect size to fit everything: lunch box, water bottle, mat, rain gear, etc. The metal fittings on the zipper have some paint chipping. Thank you for your understanding.