the weight he should weigh is 105 pounds
85 lbs.
130 Pounds
35-37 lbs
Probably 120 will be the best weight for your height.
85 pounds
90 pounds
150 pounds
120-140 pounds
About 95-100 lb.
4 ' 0 , 30 kg.
70ish
85 to 90 pounds is the average weight for a 13-year-old boy. However, this might vary somewhat depending on build.