I agree with
@Himeko057 completely. We have commented on sizing in the past and have the exact same views!
My first thought when I saw your pictures is that they BOTH look too tight. Definitely not the 17 (.75 cm wiggle room is too little), and the 18 even looks like a tight fit because it looks like it’s pinching your skin even though this technically would be an exact fit, given the 1.5 cm difference if you do have a 16.5 cm wrist bone.
I would try the 19 also; however, you say you have Covid weight on so it's difficult to say what will happen if you lose that weight.
For reference, I prefer the loose fit ( > +1.5 cm ), and mine is 2 cm difference from my wrist bone.