How to execute a script for all files?

Question

cmd/bat

Help, I need a script to resize images. Wrote a batch file for imagemagick, but how to make several images resized.
I want all selected images to be resized. How to do?

@echo off
set in=%~dp1%~N1
set name=%1
%~dp0magick "%name%" -resize 253x434\! "%in%.jpg"

Answer 1

for %%i in (%*) do %~dp0magick "%%i" -resize 480x272\! "%%i-psp.jpg"