A pantry drawer can be any size. Without over complicating things ? I like a SINGLE pull on a drawer. At at least 25 % of face width, unless a cup pull. There is no reason to have to use two, and a single centered yank of a drawer with ONE hand is easiest.
12 and 15 look fine with a three inch
18 and 21 look fine with a six inch
24 and 30 look good with nine......
a 36 looks fine at nine or even 12 inch
If using a pull on uppers? six virtually always a good bet.
Q
ahhhhhhhhhh
Q