Screen size is not a good indicator. Sadly can’t find it anymore. Either on reddit or somewhere in the forum someone took a screen grab ob the motherboard from the Linus video. Then they measured the chassis size based on the size of the quick swap modules.
The width they came up with was around 29.5 too. Height was 20cm+
Thickness hard to gauge, but around 2 cm I would guess.
Edit: Found it Introducing the Framework Laptop 12 - #81 by felurx
- FW12 287x214mm
- FW13 297x229mm
I think the difference are the bezels. Saw some renderings without bezels, but in the LTT video there are huge (for nowadays standards) screen bezels https://youtu.be/-lErGZZgUbY?si=65scv9mWFlOjB0da&t=593
Personally don’t mind them for a convertible.