six foot/feet tall and 1.91 meter(s) ?

Is it "six foot tall" or "six feet tall" ? And how to say one measures 1.91 meter ?

He's 1.91 meters tall.
He's six feet tall.

Yes...or 'His height is 1.91m'.

'He's six foot tall'.

Rover

One foot, two feet, three feet, four feet...

Rover_KE said:

Yes...or 'His height is 1.91m'.

'He's six foot tall'.

Rover

Click to expand...

One reply was "foot", another one was "feet". Are they both possible ?
And how to say "1.91 meter" ? "One point ninety one meter" ?

I cannot post links but search for "Writing unit symbols and the values of quantities" wiki "International System of Units", etc.
which explicitly, in detail and with examples of usage
tell that plural of measure units and the values of quantities are used without ending 's'

I was link-enabled.
Wiki article "International System of Units" in section "Writing unit symbols and the values of quantities" tells:
"Symbols of units are not pluralised, for example "25 kg" (not "25 kgs").[12]"

[12]
Bureau International des Poids et Mesures (2006). The International System of Units (SI). 8th ed.. Retrieved 13 February 2008. Chapter 5."

Please backup my replies because I dunno why but all my posts are being deleted

Rover_KE said:

'1.91m is commonly pronounced one point nine one meters

Click to expand...

I prefer to know how ppl are writing

Should it be understood that units are pluralized only after fractionable parts of quantities but not after integers?

Metre - Wikipedia, the free encyclopedia gives examples where I cannot find any pattern:
39.37 inches
0.3937 inch
0.0254 metres
2.54 centimetres
1×10e-10 Ångström
10 Ångström
100 picometres
"1 metre is equivalent to 3 feet, 3 and 3/8 inches.[22] This gives an over-estimate of 0.125 mm"

And how to understand:
Symbols of units are not pluralised, for example "25 kg" (not "25 kgs").[12] vs. "names of units" there further

City Spy: Big business gets cosy with the ethical crowd | Business
Someone who is six feet tall earns, on average, £101,000 more during a 30-year career than someone who is five feet five inches, and 58% of CEOs at Fortune 500 companies are over six feet tall.

Is six feet tall wrong?

"6 feet tall" is not wrong. But native speakers may use "foot" in this case.

Especially when it is not an exact number of feet. I would say that I was five foot ten. Not five feet ten. (Meaning 5 feet and 10 inches.)

We native speakers usually use the singular form of the measurement when the measurement is a noun-modifying adjective:

A six foot ladder

A three mile run

A fourteen pound turkey

A 350 degree oven

A fifteen thousand dollar tax bill


Otherwise, we use the plural form:

A ladder six feet long

A run of three miles

A turkey that weighs fourteen pounds

An oven heated to 350 degrees

A tax bill for fifteen thousand dollars

vgv8(8888)8, please avoid using forms such as 'ppl' and 'dunno' -
Please don't use 'chatlish'; this is a forum, not a chatroom
Thank you.

mykwyner said:

We native speakers usually use the singular form of the measurement when the measurement is a noun-modifying adjective:

A six foot ladder

----

Otherwise, we use the plural form:

A ladder six feet long

Click to expand...

What is modifying adjective?
modifying what?

sunsunmoon said:

City Spy: Big business gets cosy with the ethical crowd | Business
Someone who is six feet tall earns, on average, £101,000 more during a 30-year career than someone who is five feet five inches, and 58% of CEOs at Fortune 500 companies are over six feet tall.

Is six feet tall wrong?

Click to expand...

No, "six feet tall" is not wrong.

vgv8 said:

What is modifying adjective?
modifying what?

Click to expand...

A six-foot ladder. Ladder is the noun that "six-foot" is modifying.


A two-day delay. A delay of two days.
A six-week course. A course that lasts six week.
The million-dollar question. A question worth a million dollars. (Metaphorically)
A three-mile walk. A walk of three miles.

Note the hyphen.