Honestly, 5cm on the femur is quite acceptable in terms of proportion.
I undergo femur surgery for 8cm and my height was 175cm.
Considering your height, 5cm on the femur won’t appear strange. Additionally, 5cm on the femur isn’t truly « 5cm » in practical terms, unlike the tibia. Therefore, if you get 5cm on your femur, in reality, it will be a little less than that.
