I know these aren’t RF but mention them because the need I often have to fill is best categorized as ‘pocketable’, ‘spare body’ and/or ‘backpacking’.
For the collection.. The one I like: Retina I with Ektar 3.5 is 39mm (85mm open) x 78mm x 122mm (not RF) and 460 grams.
The Rollei 35 is 40mm (57mm open) x 67mm x 99mm and 350 grams, and includes a light meter.
I wouldn’t call the 35 RC cheap but other small cameras I have considered I would call cheap: the pentax pc35 af and olympus xa and (horrors) minox.
So 100 grams or 22mm on a dimension doesn’t break a camera out of “small” for me. I don’t want much bigger than Retina I so not rushing to get a II.
But what kills it (makes it bad) for me is the mechanical issues (ratchet gear breaking, electronics age, whatever causes the Minox to be scary) or image quality problems (my Rollei 35 flare).