Is it possible to put size on
with S&S: I imagine you'd like to know if the program alone will put muscles on you. Well, it's not that easy to answer.
1. How big are you now: depending on your existing muscle mass, S&S could do anything from decreasing it, to maintaining it to increasing it.
2. How far do you plan on taking it: the routing with a 24 kg kettlebell is one thing, with a 56 kg one is a completely different one (and very few can sport it - Levi Markwardt is the only person I know of).
3. What are your expectations: are you targeting a beach body, Kay Green or something in the midle?
My personal experience is that I put on muscle (I reached Simple and than stopped the program), but not even near the size I gained with RoP and far from RoPPE's (refer to
@Mark Limbaga for this last one).
One thing is for sure: S&S is not an hypertrophy program. It's very good at what it aims (GPP), but it's not meant to make you big (in fact, I suspect it's effect in the long term would yeld opposite results: lots of general strength while minimal increase in size).
If you want to gain size I'd suggest you look elsewhere. There are means to gain strength
and size with kettlebells, S&S just isn't the right one.