I measured the Bialetti 06816 Bicchierini Espresso Cups using Marie Kondo's yardstick.* I'm keeping them.
*"[T]he best way to choose what to keep and what to throw away is to take each item in one's hand and ask: "Does this spark joy?" If it does, keep it. If not, dispose of it. This is not only the simplest but also the most accurate yardstick by which to judge." — Marie Kondo, author of The Life-Changing Magic of Tidying Up (read an excerpt on Boing Boing)