Adding more pics:

I prefer the 8" pulls for sure. I think a lot of people are overscaling their pulls these days! The old 3" kind is absolutely too tiny, but let's not go wild in the opposite direction. Putting 5-6" pulls on the smaller drawers would make sense to me and look good with the amount of knobs you'll have from the door and the small square drawers. You could probably do 8" ones there too, if smaller is not available. Mock it up with a strip of skinny masking tape to get an idea. Having looked at MANY designer kitchens to see specifically what they're doing with pulls & knobs, almost anything goes in terms of size and type on what!

Too many sizes / overthink in a kitchen with too many drawer sizes and a bit of cabinetry overthink?

I would do 8 " on the thirty inch drawers, 8" on the trash pull and all knobs for everything else. Done and hard, made SIMPLE.

I usually agree with Jan Moyer, but differ here. Have had knobs in the past. Much prefer all pulls (handles). Pulls are more ergonomic, and do a better job of keeping fingers away from the draw or cabinet door. Also, a pull can be opened with one finger, should your hand be grubby. It’s a less busy look, too.

Never cared for the look of oversized pulls. I prefer them to be in proportion of the size of the cabinet.

I like a simple stailnless pull in proprotion to the cabinets and drawers they are even oftn installed not all in the same direction I spend quite a lot of time laying out pulls in my clients kitchens I use painters tape to test size and direction and proportion This is what I think looks best but it takes time to get it right .