Tuning tipSour? Grind finer. Bitter? Grind coarser.

The Tuned Cup

Basics · the low string

Size

The right grind for every brewer, from espresso-fine to cold-brew coarse.

Still tuning this one.

Size: those guides are on the bench right now. Until they're ready, these ones are in tune.

Or tell the finder what's off

Still out of tune?

Tell us what's off — sour — and we'll find the fix.

    What's wrong with your coffee?