ASk the printer. Seriously, each printer has different margin properties, and Photoshop just reads in the settings from the printer driver. I have, in the past, printed out a page of gridlines to determine what the margins were on various printers at my disposal. (Maybe there is an easier way to do it now.)
most printer manuals will tell you right out. if you don’t have a manual, most manufacturers put copies online in pdf format now-a-days.
I suspect Mr.Ali’s question may be more about image resolution than printer specifications.
But without details of the image size in pixels, and how it is to be printed, it is an impossible question to answer.
Ali, if I’m correct in interpreting your question, an inkjet printer needs an image resolution of not less than 180 ppi. For professional printing, not less than 240 ppi. Those are rough and ready averages.
