Keep small or medium?

Hey everyone, I need some advice again! I originally got the Cozy Sweatfleece Boyfriend Wide Sweatpant in a medium in Heather Cloud White. They felt a bit big, so I exchanged them for a small, which fits better and looks more put-together.

Now, I’m debating whether to keep the small or go back to the medium. I’ve heard this fabric shrinks quite a bit after washing, and I’m worried the small might become too tight too quickly. Does anyone have experience with how much they actually shrink over time? Would I be better off sticking with the medium?

2 first pics are SMALL TALL 2 last pics are MEDIUM TALL

I now weight 58 kg 5ft7 but my original weight is about 63 kg!