They’re like 1/3 neck 2/3 torso! You can actually kinda see where the neck turns into the torso because of the difference in thickness, I marked it with a green arrow here:
It’s a lot easier to see in person though since the chest moves when they breathe so you can be sure that’s where the lungs start.
So, next question. If a snake had arms, would they be up near his head or closer to its butt? Like is it mostly torso or neck?
They’re like 1/3 neck 2/3 torso! You can actually kinda see where the neck turns into the torso because of the difference in thickness, I marked it with a green arrow here:


It’s a lot easier to see in person though since the chest moves when they breathe so you can be sure that’s where the lungs start.