Are you a Longboarder thinking about going a bit shorter? I highly recommend it.

The BobSled & CarverFish are great starting points. The 7'4 to 7'10 range is a great starting point too. Adjust width and thickness to suit your weight and preference. Don't be afraid to stay wide and thick for comfortable paddling power, almost as good as your longboard.

www.mctavish.com.au/surfboard/bobsled
http://www.mctavish.com.au/surfboard/carver-fish

If you're already getting to your feet really fast, and making at least 9/10 take-offs on your Malibu (9+ footer), and if you don't have something shorter, you should think about these dimensions... 7'8 x 21 x 3". That would suit someone around 6 foot, and 90 kilos. If you are shorter/lighter, or heavier/taller, think along the lines of either 7'2 x 20"3/4 x 2"7/8 or 7'11 x 21"1/2 x 3"1/8. (or 3" but retain foam volume elsewhere).

They will slide down the line like a log can, in knee high / above knee high point breaks. But when it gets head high and a bit more punch, they will zip off the bottom, pivot hard off the top, and you can also allow them to do beautiful long drawn out bottom turns too. Play around with the fins... Have fun!

Mine is a Golden Dawn from Bells Beach.