I can’t help you with widths, sorry.
The top picture you posted looks like rope, flat anchor, and figaro.
The bottom picture you posted looks like figaro and (devil spawn) snake. I detest snake chains.
Chain length is key, and take these guidelines with a grain of salt. Of course irl will depend on actual circumference of your neck.
Also if you are looking for exact duplicates - you’ll notice many many chains vary in actual link design between different manufacturers, and many chain styles have various substlyes available as well.