54 kg I am 13 and weigh about 8 stone
Well for a girl 5'4-5'7 for a boy since they are usually shorter than girls around 11-13 years old about 5'3 to 5'6 I'm a 12 year old girl and I'm 5'6 but that's the height of an average 13-14 year old girl. But boys especially around 11 are usually shorter than the girls.
About 80-95
A 13 year old girl should weigh somewhere between 95 and 105 pounds
Prolly 5'4-5'6" I'm 6'1" 13year old and a giant for my age
No
the average is from 5"2 to 5"4
120 lbs
75 pounds
120-140 Pounds
1300grams
I am 13 and a half, and I am a size 8 (UK)
Anywhere between 7st8" or 9st11''
About 1.5 kg
Of course.
20 pouds is an average but if you want to get good bench press 50 but have a spotter
No
Of course