Of course, Ethel Granger and Cathie Jung are among the best known corsetwearers of contemporary corsethistory! Both ladies appear in the Guinness Book of World Records. You can find Cathie on the website of Guinness Books of World Records under Human Body/Smallest waist on a living person.
The entries state Ethel’s corseted waist of 13 inch (33 cm) and Cathie’s 15 inch (38 cm) but in a way, Cathie has beaten Ethel.
In her time, Ethel Granger was able to reduce her waist from 23 inch (58,5 cm) to 13 inch (33 cm), so, a reduction of about 10 inch (25 cm). Cathie Jung reducedher waist from 26 inch (66 cm) to 15 inch (38 cm), a reduction of 11 inch (27,5 cm).
To achieve this, it’s an absolute necessity to wear the corset day and night. Only when the weather is unbearably hot, the corset is taken off for a short while.