What requirements/version of Photoshop I have to buy? [was: measure the area]

I need to measure an area on a photo similar to what is shown in https://www.YouTube.com/watch?v=E3O-V6WLw0g .  What requirements/version of Photoshop, I have to buy?

Photoshop Elements 10 is a different program than Photoshop and it doesn't have this feature.

You must use Photoshop for this.

Tags: Photoshop

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