Pot/grow medium sizes

I'm planning on starting a small grow in a pc case, thing is I'm not sure what size of pot I should use. The dimensions of the case are L14 W7 H23 (in inches)
Tips would be greatly appreciated.
(also if anyone knows a good way to get custom pots that would be amazing)

Dang man.... You got a long way to go.... Do you have an empty pc tower?

Is the case all hollowed out

No actually I'm close to finishing it, all I need to do is put in the lights and power supply. Have the mylar, fans, insulation, and odour control.

Nice well under way. I made a home made pc grow box myself. I have a video on YouTube so you can get an idea of what I did to maybe help you get an idea. Would you watch it? Might help

Sure send away.

How did you get that plexi glass sized for your case? Also how did you install it?

Well the plexie glass was from a little kids like "bug
Container" or a reptile cage thing. I had to measure out the size that I needed and cut it down and sanded the sides to get a smooth finish. I put it up by there little hooks. I super glued/hot glued the hooks to the metal case of the pc. Then I put up my reflective and put little slits or wholes for the glass to sit on.... If that makes any sence. Lol I tried