Is it haram to have trousers below your ankles?
Wearing any clothes below the ankle is haram?
Is it haram to wear pants below ankle?
Can show their ankles in Islam? – Youtube Islamic Academy | Ask Abu Saif
As for what some people do, wearing their pants below the ankles, this is not allowed. The Sunnah is that the shirt or anything else not to be lowered than the middle of the shin, in accordance with all of the Hadeeths.