Cabinet hardware sizes can vary depending on your own personal design preferences, but you’ll want to choose a size that is both stylish and functional. Bar pull sizes are generally determined by the “center-to-center” measurement (the distance between the two screw holes). If you have pre-drilled cabinetry, you’ll need to buy hardware that fits the existing center-to-center measurement. Otherwise, you’re left to your own devices in choosing the size of your cabinet hardware. Here are a few general guidelines to follow:
Finally, one of the more technical parts of cabinet hardware are the ball-bearing slides or tracks and latches that are used to open and close drawers and cabinets. Sliding tracks are what allow drawers to open and close smoothly, and using drawer slides that have soft-close ball bearings allow them to close slowly so that they don’t make much noise or rattle everything inside. Drawer slides are available in side-mount, center-mount, and undermount versions, depending on the amount of space you have between the drawer and the cabinet opening. 
Based on this, you can then figure out the relationship between your cabinet doors and the frame or exposed edge of the cabinet—do the doors cover part of the frame or edge, or are they inset so that you can see that frame? Depending on whether it’s a single cabinet door or a double cabinet door, the frame or edge might be covered by one or two cabinet doors. 
I'm a wax girl. Wax always seems to work best for me and I'm ok with reapplying every 6 months or so. With that said, I cleaned them really good krud cutter. It's a great degreaser. Then sanded them first with 120 grit, then 180 grit, and finally 220 grit. Then cleaned them again with the vinegar/water mixture. I always have a spray bottle with the mix handy. Once dried, I primed and painted followed by waxing.
Generally speaking, I like to see a combination of knobs and handles/pulls. Knobs or handles for the doors and handles or pulls for the drawers. If you are painting your kitchen, the extra holes can be filled, sanded, and smoothed prior to painting so you can start with a clean slate and choose any hardware for your update. I say “generally speaking” because lately I’m drawn to kitchens that have all handles like this “before” photo of a kitchen we recently updated.
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