Hi Josette, glad to read you have bought some more DR's, lucky you!
Now, am I reading this right....your plant is 3 inches wide and so is the pot??? If that is the case the pots are most certainly too small...how will the caudex grow, it will have no room to swell at all? You will need a pot that gives at least one inch each side of the widest part so 5 inch diameter minimum I would suggest. Maybe someone else would like to add their thoughts...these are only mine :)
I have just repotted my 3 bigger ones, also with 3inch diameter bases, they have gone into 7inch diameter pots from 5 inch ones...mainly because I could not find any 6inch shallow ones. They are in the gritty mix so I should not have issues with soil staying wet which can be a prob when plants are overpotted. So 7 inch max I would suggest. I will try and post some pics tomorrow in the light of day!
As I said, hope someone else will chime in...
Gill UK.

I haven't been very successful with the delicate seedlings, so I gave up and bought mature ones.

I did buy pots before the plants came, but the plants were much smaller than I expected! I have 8in pots and these guys are barely 3in wide. I'll take your advice and get some 5in pots.

-Josette

I think that would be best, your 8inch ones would IMO be way too big...hopefully not in the future though! Sorry to learn your seedlings have been a problem for you, they can be rather fickle. At least you have been able to get some plants to give you a head start though.
Gill UK