Larger Pictures

What kind of images are you talking about – Raw files, edited images, graphics, …? 

What are the current and the intended pixel dimensions? 

Thank you for your answers. I only wanted to make them in the 4200's pix size. A lot of mine are coming out less than 1100 pixels.

Export As and Save for web can only export in pixels.

Save for web has a limitation of 8192 pixels on the long side, and Export As seems to have a limitation of 14999 pixels on the long side.

Note that both will strip out the ppi value (it's possible to keep it in SFW), so if this is for printing, use Save As.

You can always set an image size in pixels. Either in the Image Size dialog, or directly in the Export or Save For Web dialogs.

That said - since your headline says "larger pictures" - it should be clear that enlarging an image will never improve anything. There are vary few valid reasons for enlarging, Large format printing is not one of them. The larger the print, the farther away it will be seen from, so the optical resolution stays the same.

Export/Save For Web are intended for web/screen/mobile devices, so there it's mostly about making images smaller, not bigger.