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 we write 5 inches?

2, in. is the abbreviation for inch. You could write either 5’5″, or 5 ft. 5 in. I prefer five feet five inches, but I hear five foot five inches probably more than I hear feet, in common usage.

What is the inch symbol?

As you may know, twelve inches make one foot. Feet and inches have a similar symbol. For feet, a single apostrophe is used (‘). For inches, a double apostrophe is used (”).

“Five feet seven inches” is correct usage.