print web page in different print quality width fix element size, mozilla, dot matrix printer

I am having problems with printing in dot matrix printer. My client printer is Epson LX300+II and Epson LQ-2170. I need to print from a web apps that written in php. with web browser client is Mozilla Firefox But i can't set the fix width for the layout. for example:

<div style="width:2in">
content
</div>

when i pr开发者_C百科int those things, different print quality produce different size of printed content using LX300+II, print quality 120x72 dpi the 2in will be printed around 1,7in using LX300+II, print quality 120x144 dpi the 2in will be printed around 3in how am I able to create a fix layout in html to be print in different print quality because my client using 2or 3 different printer to print the form.

printing always seems to be a problem with browsers not to mention that browsers tend to add their own headers and footer (unless the user is clever enough to know how to switch this off). I have found the best way around this is to create a PDF document which the client can view and print when they want.