I bought some Koken Z-eal sockets and I thought I'd show some comparisons.
The first pic is all 17mm sockets starting on the left is Koken 3/8, Wright 3/8, Koken 1/2 and then Proto 1/2.
The second picture is 24mm Koken 1/2 vs Proto 1/2.
A few weeks ago I would have thought 1/2 low profile...