Measuring ruler with inch markings and fractional divisions, emphasizing the 12-inch point.

Let’s look at the ruler in the image.

We are being asked to find what measurement is shown by the arrow pointing to “1F” and “12”.

First, notice that the big numbers on the ruler — 11, 12, 13, 14 — are inches. So we’re measuring in inches.

The arrow points right at the mark labeled “12”, which means it’s exactly at 12 inches.

But wait — there’s also a label “1F” next to the arrow. In some rulers, especially those used for construction or carpentry, “1F” might stand for “1 foot”. And since 1 foot = 12 inches, that matches!

So whether you read it as “12 inches” or “1 foot”, it’s the same length.

Also, check the smaller marks around it:
- Below the inch line, we see fractions like 7/8, 1/8, etc., but the arrow is not between any of them — it’s exactly on the whole number 12.
- Above the inch line, we see decimals like .750, .875, etc., again — the arrow is aligned with the main “12” mark, not any decimal fraction.

Therefore, the measurement shown is exactly 12 inches (or 1 foot).

Final Answer:
12 inches