ShopTalk: Standard 3 iron length

[Jorge Cordero]

Jents, Can someone give me the standard length for a men's 3 iron?  I've seen 38.5" and 39."  I know it varies by height, (wrist-to-floor measurement).  I used to have a chart that someone shared with the group several years back, but unfortunately, I've misplaced it.    My wrist-to-floor measurement is 36" and I'm 6' tall.  The charts I've seen on the net suggest +0.25" from standard.  So is it 38.75" or 39.25"?   Jorge