3″ X 3″ X 7/8″ corner brace
3/4″ X 3/4″ X 3/8″ corner brace.
Corner Brace 2-1/2″ X 2-1/2″ X 3/4″.
5/8″ X 5/8″ corner brace.
2″ X 3/4″ X 3/4″ corner brace.