Thanks for the quick response! Here is a photo:

IMHO, those are way too small to remove, now. I would leave them for several months at least.

Personally, I would let them attached for a bit longer; then detach and set on top of the gritty mix - they won't have any stem to 'bury' in deeper. You could leave them air dry for a while, but probably not needed unless you are using wet and fine soil.

Here are some of very different plant (xGraptoveria 'Fred Ives') - this plant grows air roots too. I let them grow bigger, twisted off and potted later on same day.

Here they are week later:

and few months later:

I prefer to detach bigger plants, they have more 'strength' to survive. You can see how much bigger they are even if this plant multiplies very easily.

Your plant will not have such long stems (mine were little etiolated too) and most likely no roots (some plants don't grow them) but the procedure would be very similar.

They shouldn't be watered much after potting up before they grow some roots, that may take few weeks or longer (depends on plant).

As Howard and Rina noted, those are two small yet - wait until the fall at least.

Right now I pinch off pups just to direct the growth to the parent plant, but if planting the pups is desired is it good to wait until the pup stem hardens off somewhat before removing?

ez

What kind of succulent are those?

I have had successful pups and that size but... it's better to wait until they're bigger. You might get them to stem off a little bit and if that's the case, a nice clean cut, let it callus if it needs or just place it on the surface of dry media. Should be totally fine!