I specifically buy backpacks that fit a folder but are not too small for a preschooler. A 14 inch straight sided bag would fit and this bag looked perfect. Size 7L is described as 14 inches but that is not exact. From the photo I took you can see the size of this bag barely reaches 13 inches. It's possible that a 14 inch ruler could fit in this pocket if it rubs the top and bottom, but that's not the right way to measure the pocket. You apply the ruler or tape from seam to seam, not edge to edge. It's what's inside that matters. (Except for luggage to be carried on an airplane.) So if you're sending a child to a preschool who needs a portfolio, this 7 liter portfolio will do if you're comfortable with the corners barely going into the pocket to press . Otherwise, take 12 liters. It claims 15 so that's probably the real 14 I'm looking for. (Not yet purchased due to availability.)
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