Net-A-Porter accidentally left very awkward Photoshop instructions on a model's image.

An online retailer has been left red-faced after they uploaded a photograph to their site which still had instructions for changes to be made in Photoshop.

The image, uploaded to Net-A-Porter and advertising a pair of AU$56 socks, shows a model wearing a tartan skirt and bomber jacket, is littered with arrows and notes to “please slim”.

The arrows appear to point to the model's arms, shoulders and... hand?

A spokesperson for Net-A-Porter said the Photoshop instructions were in reference to the products and not the model herself.

"We post images that accurately represent the garments so that customers receive product they expect," she said.

LISTEN: Mia Freedman makes a case for realistic images on Instagram.

"This image was uploaded to our product page in error and the notes refer exclusively to the garments."

The image has since been removed and replaced with one without the retouching notes. It appears no other edits have been made to the photograph.

Of course, the luxury online retailer isn't the first brand to suffer a case of the 'Photoshop fails'.

Just last month, Vogue was criticised after it appeared they had Photoshopped their front cover.

Gigi Hadid's arm appears to be unusually long in the photograph, which features models of all shapes and backgrounds, including Ashley Graham, Liu Wen and Kendall Jenner.

Woah woah... This #VogueCover ... photoshop gone wrong (Gigi's hand), trying to make Ashely look thinner (only one with hand down) & more pic.twitter.com/BsgDjrPlA8

— Madison Brodsky (@BrodskyMadison) February 8, 2017

Proof that nobody - or no image - is safe from Photoshop.