A total of 5 reviews of this product on Reddit.
sorry I was on mobile at the time of writing.
* CTRL and Space keycap are in fact the same exact size,
* CTRL = 1.5u (Left and Right) SPACE = 5.75u
* Cap Locks, has an off-center stabilizer so the one in this link looks to be the one we want.
* Left Shift it matches, and the Right Shift is bigger and that also matches up.
* Everything else is Standard.
So looking at the link you sent me, if you look down below in the pictures provided, the seller shows the original compared to the specialized set and they do in fact match up exactly to the logitech keycap and layout. You can even see them on a logitech board fully changed out.
These keycaps are apparently supposed to be stronger than PBT keycaps, that is what the seller is claiming, so that is also interesting.
This is what I found last night, it seems to be the same maker of the keycaps, and this provides the only non-standard keycaps we are looking for. You can even see a review on the page, a person confirms it is in fact the rare 5.75u space bar size.
|5 Keys PBT Double Shot Laser Carving Backlit Keyc…||$22.98||$22.98||4.6/5.0|
^Item&nbsp;Info | Bot&nbsp;Info | Trigger
Okay so as many others have said, the layout Logitech uses is non standard, with the biggest offender for me being a 5.75u spacebar. (logitech is the only company that uses this size as far as I know) After looking for that spacebar specifically, I stumbled upon this set here. It seems to be a kit for the non standard keys. You can combine that with an MX compatible set like this and you’ll have something that works.
amazon seems to have some, im not sure of the quality though
So far, these are the only keycaps that are dedicated for the bottom row of any Logitech mechanical keyboard with MX style switches. What’s the kicker about Logitech is that they use a 5.75 spacebar, so your options are limited. In short, you’re gonna have to get another PBT keycap set to compliment the other one I just linked.