I'm wondering the same thing right now, especially the drawers. How do you know whether to put one or two on the drawers?

I'm not a designer so this is just personal opinion, but the size of your hand doesn't change so get something that's going to be easy to use. Don't base everything on looks.

Just redesigned new kitchen. I have all drawers on base cabinets, except under sink. I used 18 inch pulls for everything that was over 24 inches wide. My son is cabinet designer and makes custom, and he recommends pulls over knobs on drawers. Then use pulls from the pattern family for your doors. I used 4, 8, 10, 12 and 18 inch pulls everywhere. Looks so good. Then used a larger knob for upper cabinet doors. Everyone loves my kitchen. I would not out 2 pulls or knobs on a drawer....just my opinion because you always have to use two hands to open it with. With larger pulls. large drawers just glide open with one hand.

Where did you find different designs of pulls that come in different sizes?