Backpacks
come in many sizes. Most parents understand that your
child's backpack should not be too big
for him/her.
However, your child's backpack should not be too small
either. The backpack should still be large enough to help distribute
the pack's weight.
As a rule of thumb, your child's backpacks should be only slightly
smaller but not larger than his/her back. To know exactly how big is
your child's back; you should take accurate measurements
rather than depend on visual comparison.
To
measure your child's back; first take measurements
from his/her shoulder line to the waist line and add two inches or 5
cm. This length is the maximum height your child's backpack
should be.
The shoulder line is where the backpack straps (common strap type
backpack, strap position will be different for sling type) will rest on
the body, approximately half way between the neck and shoulder joint.
The waist line is normally measured at the level of the belly button.
When properly worn, the backpack should rest about two inches below the
shoulder line and four inches to six inches below the waist line.
Adding the difference between 2 and 4 inches gives us 2 inches which we
compensate by adding into our measurement.
The
width of the back can be measured at a few locations along the
child's back. To carry a backpack comfortably, we want to
distribute the pack's weight across the shoulder, back and
hip muscles.
To do so, we should rest the backpack between centres of both shoulder
blades. Measure the width between the ridges of both shoulder blades to
approximate the appropriate backpack width. I backpack that is too wide
may be too heavy for your child. On the other hand, if it is too
narrow, your child will feel very uncomfortable since the weight is not
well distributed across his/her back.
The
dimensions for the backpack's peripherals should be
considered too. Wide straps are good for comfort and weight
distribution, but overly wide straps make it difficult for your child
to put his/her backpack on or take it off.
After
getting measurements for your child's back, you now know
the size limit of the backpack you should get. But size is only half
the story. A correctly sized pack can still end up being too heavy for
your child if it is packed to the brim.
In
terms of weight load, your child's weight should be
considered. In general, a child weighing 30 kg should not carry more
than 2.5 kg of backpack weight. A child weighing 40 kg should not carry
more than 5 kg of load and so on. For every 10 kg increase in your
child's weight, the maximum backpack weight should not
increase by more than 2.5 kg. However, no child should carry more than
10 kg on his/her back, even if your child weighs more than 70 kg (your
young child weighing in excess of 70 kg is potentially facing a
different kind of health hazard)!
Note
that the small backpacks you are buying may be fairly heavy in itself.
This is especially true for durable materials such as canvas. As much
as possible, keep the backpacks light unless you expect high duty use.
Your child should never need to be carrying around weight that he/she
doesn't need.
Remember,
buying a suitable backpack is not about the latest designs or cartoon
characters. Thousands of children suffer from back or neck related
injures due to poorly sized or overweight backpacks. Your
child's backpack is supposed to help him/her carrying
things around, and safely too! Always choose the right-sized
packs and try to keep it light weight!