CREATE TABLE table_40148 ("Value" TEXT, "\\u20ac equiv." TEXT, "Diameter" TEXT, "Weight" TEXT, "Composition" TEXT)

What is the diameter of the coin with a equivalence of 0.60?
SELECT "Diameter" FROM table_40148 WHERE "\u20ac equiv." = '0.60'
SELECT "Diameter" FROM "table_40148" WHERE "\u20ac equiv." = '0.60'