Possible Clues:

• Amount of toys in Santa's sack
• Amount a sack will hold
• Grocery shopper's unit
• Amount of groceries, say
• 'Baa Baa Black Sheep' wool unit
• "Baa Baa Black Sheep" wool unit
• Filled up type gets carried away by graduate meeting girl friend you left
• Grocery quantity
• Wool amount, in rhyme
• Groceries unit