I already know the standard for that kind of key (1.25U). I just wanted to replace the keycap to something not related to Windows. It may sound stupid, but this situation is bothering my head (aspie here).
Redragon Kala User with cheap and black ABS keycaps. Every keycap set I see to buy (common brands) has the Windows Key.
something like this might be fun if you like Portal:
I’ve also seen keycaps that have poker suits on them. (these are sold out but something like this):
Not stupid at all. Same here. I haven’t used Windows for years now. That keycap makes no sense to me. 
In QMK, these are KC_LGUI and KC_RGUI; these often have fun/interesting replacements in keysets like “Super” or “Code” or “Command” (the former being a semistandard nomenclature in Linux for that key, the latter being the Mac keyboards’ standard nomenclature for that keycode).
Honestly if anything in a set serves your needs for what that key does and feels memorable to you: use it!
There’s the Linux keycaps in MT3 /dev/tty Lost + Found set. Drop + Matt3o /dev/tty MT3 Custom Keycap Set | Mechanical Keyboards | Keycaps | Custom Keycaps
In my opinion, as long as there is no windows logo, but ‘WIN’ text there is no need for replacement.
For me personally, this plays very well since I use a tiling window manager, and I use the window keys for window control, so there is no problem at all
Win-win then.
Exactly!! i’m tryng Tiling Window Managers and I want a blank or “super” key.
That’s the reason. I’m trying tiling window managers and I keep using the win / super key all the time.
If you bought a nicepbt set they come with “super” caps. Otherwise i would just use a blank
