I didn’t even think as long and hard for birkin or Kelly. I just went with B30 and K32 though occasionally I may think k28 may be betterYou’ve selected the color. You clearly like both sizes or you wouldn’t be considering them both. At this point you just have to make a decision and stick with it and don’t overthink it. Choose the one you know you will use the most, not what’s the most popular.
22 looks best on you.
Ironically, picotin causes me to think so hard