Here is a picture of some of my 4" stockmen that shows a range of different clip blade shapes.
The second and third from the left are both Queens, and are the most pleasing to me. They have clips which are about 1/2 the length of the blade, with a nice upsweep to the tip. The Moore Maker at the far left is about a 2/3 clip, while the Robeson remake in green bone in the middle has a very narrow 7/8 clip. The yellow comp Buck second from the right has a convex clip which is less pleasing to my eye.
Here is another comparison, between a Case sowbelly on top, a RR sowbelly in the middle, and a RR stockman on the bottom.
Not only are the blades slimmer, but the whole frame is too, and the footprint in pocket gets dramatically smaller from top to bottom.
I carried all three of these at different times, and the two slimmer RRs were far preferable for my usage.
Another favorite for proportion and nick placement is this Owl Head large sowbelly, with 1/2+ length clip and gradual belly.
And finally, my favorite clip blade from GEC is their long pull as found on the #72s.