A 90 inch door is taller than a standard interior door. It will be heavy. You may need a regular door knob with a good solid interior latch, not a cabinet knob with a typical cabinet magnetic catch, for these doors.

The tall doors are 15 inch wide. Not heavy.

Thanks for info. Using the kitchen image for inspiration, you can center a knob on the rail of the middle panel, and it will look fine. You can cut out some blue painter tape circles to represent knobs if you want to try moving them around.

Thanks https://www.houzz.com/user/apple-pie_order. Did you mean the stile or the bottom rail of the middle panel?

Knob can go on the vertical stile, like the inspiration photo.

IMO a long pull will look more in proportion than one tiny knob

I used knobs on my kitchen cabinet uppers, but used pulls for the taller cabinet doors in my mudroom, laundry room and built-in linen closets. Just made more sense to have pulls in those locations.

The link below has great info on choosing and placement of cabinet hardware:

https://sandiegohardware.com/blogs/resources/the-ultimate-guide-for-cabinet-hardware-placement-and-sizing

Pretty paint color! What is it?

The cabinets are HC-114 Saybrook Sage. The walls are OC-45 Swiss Coffee. The counter is Ethereal Glow