mine are about 1 3/4 inches

Here's an article from the Australia Native Plant Society that gives a decent write-up.
Dendrobium kingianum

I really like the photo of the plant on the rock in the backyard.

Being a lithophyte, mine are thriving in semi-hydro althought they are too young to bloom yet.

Cheers.
Jim

check this article from OB... Flowering Techniques for Dendrobium kingianum - Orchid Board since I follow the cold and "dry" rule, I get this plant blooming every year and have no keikis! (except once when I started watering too early, then I only had keikis and not a single flower)

Yes I do give them a rest ! Over winter it's quite damp where I live , most of my plants get a rest over winter , only give a light watering say every ten days to plants in pots smaller then four inch , and any thing larger every two weeks ! Maybe longer ! Right now I have my first CYM with flowers out ,and den are all showing spikes or with one or two close to flowering , and still another month or so for spring to arrive !!! :D I am no expert , only been into orchids for a year or so ! But it works for me ???

They should bloom soon. Probably next spring.

cool - that's what I was hoping - like I said - there are nodes swelling, so hoping for spikes rather than more keikis lol

Give it the cool and dry winter rest, and it'll bloom.

If it's too warm, it'll make keikis.

cool - I mean to leave it outside during winter - do they want a good deal of light in winter?

for my kingianum, "cool" means around 40F (5°C), which is actually very cold...

okay, but again, you wouldnt expose it to the cool, or the rest period until it is larger, correct?

i thought the adults could handle down to 36 F