What is the pixel width and height for a wallet size photo?

Answer 1

"Traditional" hand-printed, hand-cut wallets or billfolds are either 2-1/2x3-1/2 (from a 5x7, 11x14, and larger related sheets) or 2-1/3x3-1/3 (from 8x10), unless they are die-cut or machine cut with a two-edged trimmer, in which case they're smaller by a bit (with rounded corners). Baseball cards were standardized at 2.5x3.5 for the same reason.

The problem with machine-print wallets today is that they have to fit on a "page" which can be anything from 3.5x5 to 11x14, and to be economical the labs want them to fit neatly, with no gaps. So the dimensions "float" a bit anyways.

2x3 are mini-wallets.

2-1/4x3-1/4 or 2-1/3x3-1/3 are standard wallets

2-1/2x3-1/2 are "jumbo" or traditional wallets.

First let me say, great answer!

Hear is another tip:

They are the same size as a standard playing card :) (If machine-cut, at least that gives another visual)

Also wallets vary slightly (depending on where they were made and the brand) so if I were you I would do a low quality practice print to make sure it fits nicely then you will have the exact size for you're husband's particular wallet :)

Answer 2

You can determine width and height of single pixels from resolution. For example if resolution is 300 ppi then single pixel have width (and height) 1 inch (2,54 cm) / (divided) with 300. 2,54/300= width (height) of pixel.