About Illustrator Actions

[eppp25788359]

I have a vector object contains width 27mm & height 42mm I want a rectangle 20mm more in width and height of the selected object like path or vector or text object using actions

[Doug A Roberts]

you could set up an appearance with and extra stroke that uses the Convert to Shape > Rectangle effect, with a relative size of +20mm in each dimension:

you could then apply this to other shapes via an action if you want. or just save it as a graphic style and click on it.

if you want it to be a real shape as opposed to an appearance, include object > expand appearance in the action.