Related Clues:

• Linear measure
• Ruler segment
• Slightest bit
• Measurement
• Screen-measuring unit
• About 1/39,000 of a kilometer
• Go slowly (along)
• Yardstick division
• Worm's unit?
• Take tiny steps
• Division on a 5-Down
• Stubborn people won't give one
• Worm size
• 1/12 of a foot
• Unit indicated by '