Latest internet craze involves women comparing their tiny waists to the size of an A4 paper

For these women, their waists are literally paper thin. This new internet challenge involves comparing ones waist to the width of an A4 paper held in portrait mode. An A4 paper measures just 21 centimetres or 8.27 inches. See more photos after the cut...

According to the women taking part, the belief is that the challenge is a very reachable and healthy goal to aim towards - and fit is the new sexy.

Images of the women taking part in the challenge are being shared on Sina Weibo, a Chinese social media also known as 'Chinese Twitter'. Social media users say the trend is wrong, worrying and projects an unrealistic body image.