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My son is 4'11" 96 pounds. His friends are 5'1" 130 pounds, 4'3"51 pounds and 4'8"63 pounds. Of all of them the 4'3 and my son have the most energy and regular growth cycles. That is the key. As long as your son is well-rested, has energy to play, and is alert and with a good appetite, he is fine. The 4'8" boy has parents going through divorce and has developed eating and social disorders. He has not needed bigger shoes or clothes in 2 years. the 5'1" boy has started playing sports with my son and is on a diet. He is very active in making YouTube videos and acting but not in physically exterting play. Here is a general chart: http://pediatrics.about.com/cs/growthcharts2/l/blboysbirth.htm

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15y ago
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14y ago

Should be around 70 lbs, unless he lives in the U.S., then his weight should be somewhere between 130 and 180.

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11y ago

Average of 8 year old is 3'9" and 57.2lbs

Average of 10 year old is 4'3" and 70.4 lbs

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