A strongly recommend BCA - 255 by OMS its 5ft 2 inches and once filled does not deflate easily.. Its rolls up very small and is about 50lbs of lift so it can be used for a stable deco float.. I carry one on every dive along with a reel for it (seperate from my normal wreck reel) in addition I will start carrying BCA - 255E which is bright yellow with the word emergency, to signal if there is a problem underwater instead of just needing it as an SMB.
They also have BCA - 268 which is almost 10 feet long..
They also have BCA - 268 which is almost 10 feet long..