Tell me more ×  My son's back is ~35cm. As I understand, the
backpack should have the same height, but we have found one that
is 32cm wide x 37cm tall x 17cm deep, 900 grams.  Those extra
2cm height are okay, but there is another option: 32 x 38 x 22
cm, 980 grams. Is 38cm too tall? He will grow soon, so maybe
that's fine. But what about 22 cm depth, isn't that too much for
a 1st grader? They don't have so many books, I suppose.
share|improve this question As light and small as possible. I
would go for a little safe on location to store the heavier
stuff. –  Barfieldmv Jul 19 '11 at 12:55 add comment  3 Answers
up vote 3 down vote accepted  I would choose the one that is
flatter because it would not pull backward so much even when
it's heavy.  It's not so much the size of the bag that matters,
but what you put in it. If you're worried that he'll be carrying
too much weight, then choose a wide but flat bag, to keep the
weight close to his back and not pull him backward too much. It
can even be wider than his