Reply To: how to secure plexiglass – ideas needed Home › Forums › LUG discussions › how to secure plexiglass – ideas needed › Reply To: how to secure plexiglass – ideas needed October 15, 2014 at 9:26 pm #8258 JoshKeymaster clamped to the table. They’re 16″ tall and 24″ wide, so they give a bit when you pull on them from the top. Also not a perfect straight line at the top without attaching them somehow.