Measure size of object in image online

1. Is there an app that can measure dimensions of a picture?
2. How do you measure the size of an object?

Is there an app that can measure dimensions of a picture?

With ImageMeter, you can annotate your photos with length measurements, angles, areas, and text notes. That is much easier and self-explaining than drawing only a sketch.

How do you measure the size of an object?

Measure an object

Do one of the following: Select the object and choose Graphics > Object Properties. The width and height of the object appear in the Size area of the Object Properties dialog box.