Only use inch marks for measurements.
Mac: Hit Option-[ for left quote or Option-Shift-[ for right quote.PC: Alt 0147 for left quote or Alt 0148 for right quote. (Hold Alt as you type the number on keypad, then release Alt)HTML Code: (see note below) For left quote use “ or “

Are inches apostrophe or quote?

The international standard symbol for inch is in (see ISO 31-1, Annex A) but traditionally the inch is denoted by a double prime, which is often approximated by double quotes, and the foot by a prime, which is often approximated by an apostrophe. For example, three feet two inches can be written as 3′ 2″.

How do you put inches in Word?

Changing the measurement system in Microsoft Word

Click Advanced in the categories on the left. Scroll down to the Display group in the panel on the right. Beside Show measurements in units of, choose inches, centimeters, millimeters, points or pics from the drop-down menu. Click OK.

For feet, a single apostrophe is used (‘). For inches, a double apostrophe is used (”).