[Dabhand16]

If you crop a section out of an image, in order for you to get a print of the original size you will have to increase the size of the image. This can be trickey, as if you are using a camera with a lower than 5 mpxl sensor, you will probably loose image quality.

You have different resizing options. Some software will create more pixels to give the extra needed to make the bigger image. Just making the image bigger with no extra pixels being added will also give quality issues.

There are programs that are designed specifically to enlarge images and these will usually do a better job than standard editing software.

I don't know if Elements has it, but in PS, in the image menu > image size > look at the document size. This can be changed in this dialogue. You can select metric/imperial etc.

Things to bear in mind - You probably have not retained the proportions of height and width in your crop. If you check the 'constrain proportions' and 'resample image' boxes, you only need to change one of the dimentions (usually the longest) to the size you want and the other one will automatically change in proportion. Look at the document size and change the dimention you want. There is also an option at the bottom to choose the resampling method - set this to the one that is best for enlargements.