Basic Design Question – Newbie to WordPress

Hi everyone!

Newbie to WordPress here and hoping someone can help me 🙂

I’m going to apologize in advance for my lack of knowledge in this area!

My question is, if I engage a developer to implement a custom theme on my hosted WP site, what information should I ask the designer of the theme to provide (the designer would be a different person to the developer).

I’m not sure what I would need to ask them to provide? If my website was 5 pages and my designer designed all 5, would I ask them to provide source files for each 5 pages?

I just want to be sure that I request the necessary information from our designer. Thanks so much!