IIRC, the NECA mask is derived from the original molds, so I'm assuming that's a combo of a small model and no hood making it appear large... either that or it's a pic of the Rubies version.
i own a Neca one, the one in the pic is a neca and yes, it is very large. I have a large head and it is quite big for me. That is a good thing though: the neca one has different details from the screen used but both are very large. from this pic you can tell how xxl the immortal costume is (look at how tiny the man in the costume appears to be!) View attachment 6824
No, it's a Rubies. Check Amazon.com, that's the same image they use, and all of the customer pics match. The NECA is studio-derived and actually looks small until it is worn.
We are talking about the NECA one here, i own one and i can assure you it is the Neca one and that it is large just as much as the screen used one even if they are not from the same mould. Neca masks and screen used masks are similar but not exact copies.