[custom_adv] A woman with a tiny waist has claimed her extraordinary proportions are simply the result of her natural slenderness. [custom_adv] Student Su Naing, of Myanmar, claims to have a waist with a circumference of only 13.7 inches, which is believed to be one of the smallest in the world. [custom_adv] The 23-year-old often shares photos of her extreme hourglass figure on Instagram, where she has faced accusations of photo editing and taking drastic measures like rib removal or corseting to maintain such a slim physique. [custom_adv] However she has undergone a lifetime of 'waist training', wearing corsets on a regular basis in order to shape her midriff.