Not sure, but if you make some, keep them low to the ground. You can train the same on 3" posts as you can on 2 foot posts, except it will hurt less if you fall off of a 3 inch post.
It's cool and traditional and all, but I'm not sure how necessary it is to become a competent fighter (I'm pretty sure no pro boxers or MMA guys use plum flower posts).
"If you like metal you're my friend" -- Manowar
"I am the cosmic storms, I am the tiny worms" -- Dimmu Borgir
<BombScare> i beat the internet
<BombScare> the end guy is hard.