Related Clues:

• Mark of a good ruler?
• 1/63,360th of a mile
• Pharmacy unit
• Snowfall unit
• Linear measure
• Ruler segment
• Slightest bit
• Measurement
• Screen-measuring unit
• About 1/39,000 of a kilometer
• Go slowly (along)
• One-eighth of a fluid ounce
• Yardstick division
• Worm's unit?
• Fraction of an ounce