A:Answer28". I taped the back "toes" of the feet with black tape (Groilla brand) to secure it in place. You can't notice the tape as it is in back and black.
A:AnswerCall 1-800-SAMSUNG or refer to the manual by copy and pastiing this link to your web browser.
http://downloadcenter.samsung.com/content/UM/201505/20150512093235006/J4000-ZC_BN68-07180L-00ENG-0323.pdf