Window widgets like buttons are too big in kde softwares

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I was using Kubuntu22.04 several months ago, the buttons and other widgets were relatively small. Now I’m using debian12 and plasma 5.27 with no other desktops installed, the window widgets are big as shown in the screenshot.
Is it due to some updates of plasma desktop? How can I switch to the smaller style? Thanks.

Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.99 (64-bit)
Graphics Platform: X11
Processors: 12 × 11th Gen Intel® Core™ i5-11400 @ 2.60GHz
Memory: 15.4 GiB of RAM
Graphics Processor: Mesa Intel® Graphics
Manufacturer: HASEE Computer
Product Name: N960Kx
System Version: Not Applicable

2

You can choose a different style in System Settings > Appearance > Application Style. If you don’t find anything you like there, you’ll need to install some new ones using your distro’s package manager.

3

Thanks for giving advice, but I’ve solved it by adjusting the kdeglobals file. I removed the line ScreenScaleFactors and the size went back to normal.