metres.

Unless you're a merkin.

Edit: and unless you're talking about a device for measuring flow, electricity, etc.
( Johnny Catfish - Yowsa!, Tue 5 Jul 2005, 14:18, archived)

really?
Hmm that's a less common one!
(Quatermass and teh Shit, Tue 5 Jul 2005, 14:19, archived)

not exactly
it's very much like centre
( sex and dougs and rock n roll, Tue 5 Jul 2005, 14:23, archived)