User blog comment:Eclectica737/Black Bolt's physical age/@comment-3419446-20190827125907/@comment-16461120-20190828015224

Since the question is specifically about Black Bolt, we have well-established ages for him at certain points in his history. His parents died one month after his nineteenth birthday at which point he was first allowed to leave the isolation chamber; meanwhile, he was twenty years old when the Unspoken was overthrown.