What type of film do I need!?

so I got a Polaroid (spectra System?) camera at an antique store today. it's not a normal one, it's like one of those they use for crime sense. I totally forget how big the film is that i need! so if you know the size of these cameras, and what size of film i need, you would be a life saver! also if you know where i could buy the film and give me some links... I WOULD LOVE YOU FOREVER! thanks so much!