drive shaft slip yoke Oetiker clamp size?

Getting around to some maintenance, and at 125,000 miles I have never lubed my DS slip yoke. Not clunking, and I know some will say it is sealed and good for life. Maybe. I also know you can use hose clamps or zip ties on the boot. But I have the Oetiker tools and if I can find a clamp I'd like to do that way. Anyone know what size we need?

 

I lubed mine up with the proper PTFE lube awhile back just cus. If i remember correctly the Oetiker clamps had their sizes stamped on them. I was able to remove them without too much damage to them with intentions to put them back on, tried but couldn't. Put 2 zip ties on the end of the bellow that i removed to lube everything with full intentions to buy the right sized clamp.

Just now realized with your thread I haven't bought a replacement clamp and the zip ties are still doing just fine 40k miles later (I lube the rear ujoints every oil change so I check em).