How do I change the image dimensions to 1000 on paint?

[ellie s]

I want to put an image on this moonpig card for my dad, and I have to change the dimensions to 1000, so how do I do that on paint?
I mean, what numbers do I put in?

 

[fred pie]

go to image/stretch /skew and change it there

 

[Pandaman]

Up the top select image > attributes voila!