Which sentence below is correct ? If both of it wrong please correct me .

Leave the door five cm open.

Leave the door open by five cm.

1 Answer 1


Either will be OK, the second is possibly more formal, but in anything except brief notes, one would write measurements in full (e.g. "five centimetres").

  • 1
    And if you're using "cm", you're almost certainly using numerals as well: "5 cm". Mixing spelled-out numbers with abbreviated units does indeed look weird. Feb 14, 2019 at 22:08
  • "Leave the door open 5 cm" is also ok. And if you're writing out "cm" for an American audience, make sure to spell it "centimeters". (I agree with both this answer and the previous comment.)
    – Mixolydian
    Feb 15, 2019 at 1:02

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .