A photo of a Topshop mannequin with unrealistically thin legs has gone viral, prompting criticism of the retail giant.

Student Becky Leigh Hopper took this picture of her size 8/10 friend standing next to a mannequin in her local branch of Topshop in the UK. The image has since been retweeted over 5,000 times.

Twitter was soon overrun by people expressing their disappointment in Topshop's promotion of such an unrealistic body image:

Despite the criticism, Topshop have yet to make a statement on the issue.

This isn't the first time the company has faced backlash for displaying overly thin mannequins in its stores:

What do you think – is this acceptable or not?