also, you probably don't need the pad to cover your elbows unless it is really cold. the colder the weather the wider pad you will want and if it's warmer, just covering your core will be enough. i used a 29-30" pad in really cold weather for full arm coverage, but bigger folks might need a wider pad. 30+ seems like it should bhe wide enough.
as for the uq, it needs to fit snug on the end edges too. the design i was referring to was shaped so the un-cinched ends fit snug. this will likely not be the case with a rectangular design though.