Thank you for your question! These were 4" tab pulls by Mockett. They are a little harder to grab than typical pulls but still work fine for drawers up to 36", at least in our experience. Go longer only for aesthetic reasons. Totally fine to mix and match and do 4" for smaller drawers (say up to 24") and a longer pull (say 6" or 8") for anything larger.
Rasmussen / Su Architects