Hey all, many doctors say they only do up to 5, 6, 7.5 so on cms. However, some other respectable doctors say that they recommend lengthening a maximum of 20% of a bones length and 15% would be the safest.

So I decided to see for myself. I measured my tibia from the front beginning at the ankle to the top of the bone before the soft tissue: a length of 3 iPhone 4s or approximately  34.3cm.
20% = ~6.9cm
15% = ~5.15cm

It seems like the safest amount for me is the safe amount that most doctors prescribe (assuming my iPhone measurements are correct).

So would you trust the 20% or 15% rule more than the 5cm like most doctors say?