Little piggy

I think it could be either:

Which length description are you looking for?:

toe

'little piggy' is the definition.
('this little piggy went to market' nursery rhyme)

This is all the clue.

(Other definitions for toe that I've seen before include "Digit; kick" , "End of foot" , "Calabria?" , "Pedal digit" , "Part of foot" .)

I've seen this clue in The New York Times, the USA Today and the Universal.

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