I prefer whole
package, and believe it can deliver more force, however, I think it's wise starting with conventional around the base of the shaft, and in time if you like, head over to full
package.
Some theorize that full
package clamping,
cock rings can damage delicate anatomy, and I will confess, it can be uncomfortable when the erection I'd solid, be ALLOT more vigilant, and during session if on a tight one, massage the scrotum, gently stretch the testicles, as they can suffer more when full
package work due to the potential of cutting off circulation to that zone.
STAY SAFE .... It has benefits but work towards it.
Not sure what size to recommend for you, probably wise to use the shop chat talk to a rep about that, as MOS got decent rings.
You could also look at buying a cable clamp, which is adjustable, and
@stillwantmore sells a clamp device for the penis to use for the shaft, not behind balls.
Let me know if you need further information.