Godred says on 17/Dec/11
6`2 - 188,maybe slightly above or below.

Mathew says on 15/Mar/11
Fan estimate of Munky: "I'm 5'9 (175 cms.) Munky's probably around 6'1, maybe a bit less."
Click Here
If Munky is in the 184 cm range JD is at least 6'2", and could be 6'3", which in fact a fan did estimate him at When Jon came to the studio he actually sought me out and shook my hand. "He's a really tall guy too like 6'3 but incredibly nice (and clean nowadays)":
Click Here

Mathew says on 15/Mar/11
He looks tall here: Click Here
He's actually a good amount taller than Loc Dog, one of his body gaurds lol.

Mathew says on 13/Mar/11
Looking 6'1.75" next to M. Shadow, additionally he's looked about that height next to Marilyn Manson on stage.

Mathew says on 13/Mar/11
Also:

Looking ~ 6'0.5" next to Jay Gordon:
Click Here

Looking ~ 6'2" next to Corey Taylor:
Click Here

Looking ~ 6'1" next to Robert Smith:
Click Here

Mathew says on 13/Mar/11
Looking ~ 6'1.5" next to 6'1" listed M. Shadow of Avenged Sevenfold:
Click Here

Looking ~ 6'0" next to 6'3.5" Snoop Dogg:
Click Here

Looking ~ 6'1" next to the current Korn line up:
Click Here

Looking ~ 6'2" next to the current Korn line up:
Click Here

Looking ~ 6'2.5" next to the original Korn line up:
Click Here

I think JD is a weak 6'2" (6'1.75") when standing straight, who can give a 6'0" appearance slouching.

Anonymous says on 1/Feb/11
Core Taylor is 6'6 which stunnhe looks 6'0 inslipnot vids lol

jtm says on 23/Dec/10
i agree with most of your estimates matthew except i would give snoop 6'4 and corey 5'6-5'6.5.

Mathew says on 22/Dec/10
I agree Jon is roughly his claim of 6'2". He slouches down sometimes. He's looked as short as 6'0" and as tall as 6'3" in photos/videos. He's pretty close to 6'2" even.

In context:
Jon: 6'1.75"
Fieldy: 5'7.25"
Marilyn Manson: 6'1"
Corey Taylor: 5'7"
Snoop Dogg: 6'3.5"

Jyn\'ll Tellya says on 17/Nov/10
I met Jon on the street while I was signing people up for test drives at a music fest. I ran up and tapped him on the shoulder and just shook his hand,but my takeaway is that I wholly believe he is 6'2 because my head came up to the same place on his chest as an ex of mine that was also 6'2"