What Type Of Fujifilm For My Polaroid Camera How To I Know Which Type Of Film A Polaroid Camera Uses" Polaroid Junkies Help!!?

How to i know which type of film a Polaroid camera uses" Polaroid junkies help!!? - what type of fujifilm for my polaroid camera

I want to buy a Polaroid of the thrift store. have many different ways. I know, Polaroid discontinued their film, but Fuji is not the kind of films now.

Anyway, my question

How do I know what kind of film that takes the camera?

Is there a number on the camera or something to tell me if its 4X5 or 3.25X4.25

How do I know that one of these films

Current bid Fuji instant film are:

Compatible with Polaroid Pack Film Type 100 (also known as "Type 660" known)

* FP-100C, 100 ISO, professional color, comparable to Polaroid Type 690
* FP-100C Silk, ISO 100, professional quality color
* FP-100B, ISO 100, black and white, comparable to Polaroid Type 664
* FP-3000B, ISO 3000, black and white, comparable to Polaroid Type 667
* FP-400B45 Super, ISO 500, black and white

For use in Fujifilm PA-45 owners. Compatible with Polaroid Type 500 version of the old pack film type 50 sheet film

* FP-100C45, ISO 100, professional quality, comparable to Polaroid Type 579 and Type 79 film pack film sheet
* FP-100B45 Super, ISO 100, black and white
* FP-3000B45 Super, ISO 3000, black and white, comparable to Polaroid Type 667
* FP-500B45 Super, ISO 500, black and white