Border radius is different in tabs, window borders, buttons, context menus. I think a good parameter to start is to use the border radius from window borders.
Created attachment 145287 [details] Mockup made by reddit.com/user/PaintingLinux Source: https://www.reddit.com/r/kde/comments/rzvw1u/redesign_concepts_and_ideas_for_plasma_yay_or_nay/
This isn't really actionable. There are so many things that this would touch that we really need separate bug reports for each thing. See https://community.kde.org/Get_Involved/Issue_Reporting#One_issue_per_Bugzilla_ticket Bugzilla tickers are more for reporting specific bugs or requesting specific features, not really so much for "fix all the things please" :) That mockup is very nice, and we are generally moving in that direction. However it's too big for a single bug report.
Ah, understood. Thanks for the explanation.