Make a 5 minute recording. Send it to a text in iMessage. Then check in settings to see how many mb iMessage is. Go back and delete the voice memo from iMessage. Then go back to settings and check iMessage again. The difference would be the mb size of the voice memo.I agree, but I'd like a guess about how many Megs 5 minutes would fill. And does it matter what is being recorded - actual voice or some music? cb