Possible Clues:

• Where mass is a measure?
• This will shortly get you to Wexford for this
• Scottish island's amount of rainfall?
• Not one foot into Wexford
• This won't get you there by foot
• Twenty-five point four millimetres
• A small part of the foot?
• Twenty five point four millimetres
• Crawl at a snail's pace
• A small distance from an island