Comment by combatentropy

It just doesn't have the same ring to it.

"He won't move an inch," or "He won't move a centimeter."

"She won't quit until she's six feet under," or "She won't quit until she's two meters under."

"I'll go the whole nine yards," or "I'll go the whole nine meters."

"You can see for miles and miles," or "You can see for kilometers and kilometers."