School Bag Too Big or Too Small? Choose by Grade and Capacity.
The most common school-bag problem is simple: the wrong size for the grade. A bag that is too big pulls on the shoulders; a bag that is too small means books and lunch do not fit. Our school bags are organised by grade, and the capacity follows the grade: Grades 1-2: 12.5L (QMG2407001, QMG2407002), 16.5L (QMG2407005). Grades 3-4: 17L (QMG2407003), 18L (QMG2407004), 22L (QMG2407006). Grades 5-6: 25L (QMG2407007), 28L (QMG2407008, QMG2407009). Two things to check on the product page. First, the size in centimetres — for example QMG2407002 is 27.5x12x38 cm. Second, the spine-protecting design: the QMG2407002 has a 6D pressure-relief back panel, a 3D support system and honeycomb breathable fabric, and the smart LED light is for visibility on the way to school. If you are between two sizes, choose by the books the child actually carries, not by the grade alone — and check the colour variants on the product page, which are listed separately for girls and boys.