Please add option to set meeting duration

Please add option to set meeting duration

Right now there is no way to create a meeting that is longer or shorter than one hour.  Right now I have to create a 1 hour meeting, then send out a very quick change in Google Calendar to say that the meeting is 30 minutes.  This looks unprofessional of me, and can cause my customers to decline a meeting that overlaps with other meetings they have, since they think the meeting is 1 hour long.

Please give options at least for 30 minute meetings, and allow for 30/60/90/120 minute meetings.  Is that doable?

Thanks!