How to blow up and print an HD image on my iPhone and retain the definition?

I'm planning on getting a shoulder sized tattoo and need a way to print out a large sized version of the image I'm going to use.

I have a high definition version on my phone but its obviously not big enough to show the detail for the artist so I need to print it.

Anyone have any experience with this? Any and all help will be greatly appreciated.

In your case. Use a printer app. Or use a conputer…

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