If it were me, I would go with the 5 inch pull on top and the 3.5 inch pulls on both trash and baking rack.

I don't think it would look right to have a knob right next to 2 different drawer pulls, but that is just me and my personal preferences.

I have the same pulls, and love them. All of mine are 5", except one 3-1/2" on a small drawer.

If you don't have knobs anywhere else in the kitchen, I wouldn't put a knob here either. I would use the same vertical pull you used everywhere else on the door, and a 5" pull on the trash - treat it like a drawer.

The doors are not all on yet... but I do have one base cabinet with 3 drawers and a spice rack. I was thinking of putting 3 knobs on the drawers and a 3 3/4 pull on the spice rack.

Or would this look better with 3 3/4" pulls also?

In my current kitchen I have pulls on drawers and knobs on all cabinets.

But for your choice, I'd forgo all knobs and do varied lengths of the pull.

I would second avoiding knobs.

I'll go with the consensus and ditch the knobs and use various lengths of pulls. Thank you all for your input.

Just a quick update on how it turned out. Used medium sized pulls on the trash bin cabinet and baking tray cabinet and a large sized pull on the top drawer.

Used small sized pulls on the drawers and spice racks. My only regret is that I didn't use a medium sized pull on the spice rack. Kind of looks too small to me.

It looks really great!

Thanks for the update - I agree that they look great!