Size of the galaxy backpack for boys middle school: 11.81(L)*9.05(W)*18.11inch(H), 30(L)*23(W)*46cm(H); Approximate capacity of the boys backpack for school elementary: 31 Liters; Weight only 600g.So Comfy Space or Galaxy Backpack for School: Widened and thickened breathable shoulder straps, Padded back panel (much closer to body), and sponge decompression top handle will go easy on your kid's school life.Mega-utility space or galaxy rucksack for boys school: Main pocket to hold books, folders, files, laptop...; Three front pockets to hold smaller notebooks, iPad, smaller school supplies...; Back zipper pocket to hold important files, certificates or celephone...Waterproof material, lightweight body of bag, breathable shoulder straps and back panel, scientific classification (multiple pockets), the galaxy school backpack will become a powerful helper for your child's learning and daily life.Worry-free after-sales service: We offer lifetime warranty and full service satisfaction for every backpack we sell, so please feel free to contact with us through email if you have any issues with our products or services.