Possible Clues:

• 9 EEE or 42 regular
• Info on a shoebox
• Estimate, with "up"
• 6 7/8, e.g.
• 7EEE, e.g.
• AA, AAA, or C, e.g.
• S, M or L, e.g.
• Coffee specification
• Petite or jumbo
• Oxford stat