Given that the Ike hasn't been minted in 45 years, I think it is safe to say it is not that. The Sacky and Tony are exactly the same width, 26.5 mm. The Canadian dollar is also 26.5 mm (as are the Prezzies and the Innos, and why are we Infantilizing coins anyway). The Australian dollar is a touch smaller, 25 mm. So I think the answer to your question is "all of them", 1.5 mm is likely larger than the variation between blueberries.
Converting that to Library of Congresses or National Library of Austrailias is left as an exercise to the reader.
Converting that to Library of Congresses or National Library of Austrailias is left as an exercise to the reader.