image won't print at specified size in photoshop

The latest picture seems to indicate the problem. In the Position and Size section, you will notice that the setting “Scale to Fit Media” is selected. That means the image size, whatever it is, will be enlarged or reduced to the printable area of the selected paper size. Which is not what you want, you want the document to print at the exact dimensions you set up in Image Size.

Notice that Scale says 125% and Width says 23.777 inches, and those values are dimmed (not editable). That is because “Scale to Fit Media” is enabled. Disable “Scale to Fit Media,” which will allow Scale, Height, and Width to be edited. Make sure Scale is set to 100% (which should also correct the Height and Width in that section), so that the document prints at the size you set up.

Because you said other documents printed at the expected size, “Scale to Fit Media” was probably not enabled in those documents.

The settings in the the Position and Size section in the Print dialog box in Photoshop are in addition to the Paper Size setting in the printer driver (the earlier pictures you posted). The Scale, Height, and Width values in this section are basically the dimensions that Photoshop sends to the printer driver. It’s always a good idea to check Position and Size to make sure they are coordinated with the printer driver Paper Size settings.