Mary Jane Kelly was approximately 25 years old at the time of her death which would place her birth around 1863. She was 5' 7" tall and stout. She had blonde hair, blue eyes and a fair complexion. "Said to have been possessed of considerable personal attractions." (McNaughten) She was last seen wearing a linsey frock and a red shawl pulled around her shoulders.
She was bare headed. Detective Constable Walter Dew claimed to know Kelly well by sight and says that she was attractive and paraded around, usually in the company of two or three friends. He says she always wore a spotlessly clean white apron.