Ignore the nominal size, I.e. L,XL, and go with the effective TT.
I,m about an inch taller than you and ride an XL Wilier because a TT of 57.5 is the best fit for me
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.