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Penis size, age 15

I know that people are always asking about this, but I'm really nervous about this. How big should the penis be when you turn 15 ? If it isnt that big, should you go to a doctor about it?
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Avatar universal
At your age, almost any size is normal. There are 15 year olds that have attained their adult size; others that are still growing, even just starting to grow. When did you start puberty? If it's just recently, then you've got lots of growing to do.
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Avatar universal
The average size for a 15 year old is a little less than 5 inches erect. But don't worry. You still have some more growing to do....

"For a mature adult, the average size for a non-erect penis is between 3-4 inches. When a mature adult penis is fully erected it can reach up to an average of 5.5-6.5 inches (see illustration above). Teenage boys will have to wait a further one to two years after they have stopped growing in height before they will be able to clearly know their final penis size."
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