Definition of how long is a piece of string? in English:

how long is a piece of string?

phrase

British
  • Used to indicate that something cannot be given a finite measurement.

    • ‘He is one of the most sought-after artists in the world and in terms of price it would be like asking how long is a piece of string?’
    • ‘Not surprisingly, that turns out to be one of those ‘how long is a piece of string?’’
    • ‘He's the best young striker I've worked with so how long is a piece of string?’
    • ‘The Irish joker who first asked ‘how long is a piece of string?’ had no idea of the everlasting wonder conjured in an Irish backwater.’