Literally every other size is available right now. I so wish Leffot handled their pre-orders like most other companies and ordered based on the size people want rather than sort of distribution of it. I'm just going to order from Context now - I've been waiting on the Leffot #8 NST for two years - because they order basically one or two in 12D and there's too much demand for it.
I am the culprit. I wear 11.5-12 in Barrie depending on the welt. I recently had to put my 11.5D JCrew PCT on the classifieds becuase they were too small in the toe box compared to the same last in other worm welted boots. I saw a classified for this leffot makeup and the guy said he felt this one fits more TTS (possibly like the J Crew one), so I ordered the 12.
If they don't fit well, I can give you dibs if you want.