Help Sizing Images

[Stuck In A Lift]

I've got some good photos I would like to put into frames. The trouble is they don't print to the size of the frame, in this case A4.

Is there a 'sizing for dummies' type guide around, or some simple steps I can follow?

[Stuck In A Lift]

I've just done some resizing of 4 images, using the advice here. I'm going to the printers tomorrow and I will report back with the results.

Thanks everyone, it's kind of you all.

[Stuck In A Lift]

All is now well in the world of image resizing. To you all.

Now to learn photoshop...