1.6 inches on a ruler would be a little bit past the 1 1/2 inch mark, but not quite to the 1 3/4 inch mark.

Here's why:

* 1 inch is the basic unit on a ruler.

* 0.6 inches is a little more than half an inch (0.5 inches = half an inch).

So, 1.6 inches is 1 whole inch plus a little more than half an inch.