Throttle rocker

Does anyone have a throttle rocker on their SW?
I’m not home to measure the thickness of the throttle, but would like to order one.
It seems like one for a cruiser might be too big.

Jimmy, Vista cruise makes a simple reliable adjustable throttle lock for your 7/8 handlebars.

They are inexpensive and I keep them on hand for the fellows, Installation takes about an hour.

Lloyd 193.

This is the one I've had on several motorcycles including my SWing. It's pretty inexpensive and works well. I've never had a problem with them. You can adjust the tension/friction so you can still turn the throttle if you want in case of needing to panic stop. Or if you want you can adjust it tight enough to really hold the throttle where you set it. I have known that sometimes while climbing an upgrade, or downgrade on the highway I'd have to release it either for more or less speed. But on the flats it's great.

One note tho which didn't affect its operation: If you look at the bottom of the pic there's that square U which goes over the throttle cable. I did have to take a file and widen it a bit because it was too narrow to fit. No problem. It's plastic.

https://www.bikebandit.com/aftermarket-parts/control-brakes/throttles-universal/vista-cruise/p/37587

I have a Kaoko throttle holder on my bike, I've had it on my previous Silver Wings as well. Not cheap but works well. It's similar to the Throttle Meister but is easier to use when wearing gloves.
One very handy throttle assist is the Cramp Buster. Much more useful than the throttle holder. Only about ten dollars, easy and quick to install this little device sure takes the pressure off your right hand and allows one to hold a constant throttle with just the weight of your hand. I strongly recommend this device, worth many times its price on a long trip. I use the narrow one and cut the arm down to about an inch long. That way it can't snag on one's glove. You really don't need the leverage of the long arm anyway.
https://www.crampbuster.com/