Related Clues:

• Mendon has two
• Naval rank
• Typography units
• Millennium ends?
• Ems divided by two
• Coast Guard officer: Abbr.
• Type widths
• Sizes of some spaces
• One-striper: Abbr.
• Dash widths
• The two in London
• Two of nine
• Dictionary section
• There are two to a penny
• 'Star Trek' rank: Abbr.