The Vater Jay Weinberg 908 is in between a 5A and 5B for a comfortable grip. It adds 1/4" length for some added reach. The 908 has a quick taper for a slight forward throw but with a fast response.
A little undersized in grip as compared to the popular Vater 5B - Classics 5B is very versatile in many musical applications and playing styles with its very comfortable grip size.