How to use the noun a head in plural meaning? I mean the third meaning, link. I understand I can say:

  • I'm a head taller than my sister.

How to say when I am taller more than a head? Is this sentence below correct?

  • I'm two heads taller than my sister.

Thanks for help.

  • 1
    Both sound fine to me. You could even be "a head-and-a-half" taller than your sister :D. – Teacher KSHuang Apr 10 '17 at 10:47
  • 4
    "Two heads taller" is grammatical but it sounds a little comical, since "a head taller" is a collocation. No one ever says "two heads taller" or "three heads taller", except facetiously, since "head" is not a bona fide unit of measure, and the image invoked is strange. You will hear "a full head taller" or "almost a head taller" and "a head taller" and "more than a head taller", but not "a head and a half taller". No multiples, no fractions. – Tᴚoɯɐuo Apr 10 '17 at 10:51
  • @TRomano - That's not quite true; you can find examples in live usage like "He stood a head and a half taller than Lance..." but I agree that it's unusual. – stangdon Apr 10 '17 at 12:18
  • @stangdon: You can find almost anything if you look through a midden like that :) – Tᴚoɯɐuo Apr 10 '17 at 13:04

I'm a head taller than my sister.
I'm two heads taller than my sister.

Both of your sentences are correct since head is the unit of measurement, the same would apply for inches or feet.

I'm an inch taller than my sister.
I'm two inches taller than my sister.

I'm a foot taller than my sister.
I'm two feet taller than my sister.

Using head as the unit of measure is a bit odd, however other nonstandard units of measure get used. Hands have been used for measurement as well as the famous Smoots.

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