At 3-1/2" length, when erect, I totally hang out the back of the Pet Trap, and I have extremely saggy testicles. Ideally I would like a double cock ring base - I know MM can make these, but I really want the security (and comfort) of a fully enclosing tube and I need the smaller diameter. So for me, there is some benefit in a longer tube, as more of the penis is enclosed.
I measure out to 100mm exactly flaccid, which is about 4", so the 3-1/2" Pet Trap tube with a 1/2" base gap is just bout perfect, but don't really know how to translate this into measuring advice for Dietmar. Does he include the curve length in the device length, or is the device length the total horizontal length of the device as it stick out from the body when worn?
I'm getting nervous about the smaller diameter so I measured circumference that I can happily fit around the head without feeling pinched, and I get about 100mm - divided by 3.14, that means I should be okay with 31.5mm inner diameter with a mm or so of wiggle room. I also did sequentially smaller O-ring experiments to find the smallest I could wear overnight, and found I had some numbness with a 1-1/8" O-ring but not with a 1-1/2" (this is how I sized to 1-3/8" for the Pet Trap). However, it's become clear I need a smaller diameter to be a better disincentive to orgasm.
Well, off for now, my wife will probably think I'm nuts as I run to the bathroom 4 or 5 times tonight to measure and re-measure everything. Wish me luck!
but I don't think I will be sending my tube back to get one fit, too much hassle and time (and money) for something that probably wouldn't work anyway. Although if it did, it would probably be really nice. I might send the shorter 35mm tube (I have two different lengths) back to have the fixing shortened to work with it. You really don't want a device that is at all too long with the penis plug. There is no way to "push" it back on if it starts to pull back a little.
That was a bad idea. Getting it out was the problem. BTW, if anyone is ever dumb (or horny) enough to try that, and then for some strange reason (surprise!) find your self erect, here is what to do - unthread your shoe lace immediately, use the plastic cylinder at the shoelace tip to force the lace under the ring, tie the shoelace to the ring, then use a combination of pulling and lubricant to force the erect penis head out from the ring a milimeter at a time. Then put the shoelace back in your shoe, go out and buy a bunch of soothing lotion, you'll need it.