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well,it depends from someone to an other.but normally it grows 1 cm per month(that's less then an inch)so in a year it's 12cm but maby more or for some people even less

On average, hair grows half an inch per month, so that's 6 inches in a year. (This is on average; some people's hair grows faster, and some slower.)

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13y ago

What else can I help you with?