Question about LEGO Schoolrugzak 15L 2x2 Brick Bright Red

This backpack has a volume of 15 litres and dimensions of approximately 37 cm deep, 25.5 cm wide and 15 cm high. A standard federal binder is usually about 32 cm high and 25 cm wide, so it can fit in both depth and width, but the height of the bag (15 cm) is limited. It's likely that this bag won't hold a thick or very large federal binder upright, but a thin or smaller binder will fit, especially if it's laid flat.