In the "HP Designjet Z3200 Photo Printer; Using your printer" manual it reads on page 62 (Color management):
The printer chooses automatically between two profile charts, An A3 or B format for cut sheets (example of long and small array of patches) or a roll-paper that minimizes paper use by printing across the full width of the roll (example of this).
To answer your question, a B or A3 size of paper should do the yob.
Let me warn you for something I stumbled with. The next page of the manual starts with
NOTE: Chart measurement may not be successful if you load the chart as a single sheet without skew check
I red it, forgot it, and could not understand why my beautiful patch sheet, dried for an hour, was not accepted by the Z3200; on two occasions...
Success,
Bas