ZE:A's Siwan admitted that he used to rely on not just regular insoles but a '3 level insole' to boost his height!

He'd confessed before that his profile height isn't his actual height, but no matter what, he would not reveal his real height. On the recent episode of tVN's 'Baek Ji Yeon's People Inside', Siwan admitted, "If you consider just my insoles, they're worthy of the Guinness Book of Records. But as times passed, I got exhausted from using them. Now I have enough courage not to use them in normal life."

He then recalled a hilarious event on stage, confessing that one of his shoes had slipped off once. He said, "Another member kicked away the shoe that fell off, and the insoles fell out. In the end, I limped as I danced."

Hyungsik stood witness, laughing, "I saw him from the back, and he was dancing on his tip toes."