appBarHeight

The application bar: 72 px tall, 30 px in its mini form, with 48×48 px circular buttons carrying a 26×26 px glyph.

These lived in KvadrantAppBar.kt as file-private constants until B-49, which is why they are last in this class rather than beside the other chrome. The consequence of being outside the set was the one the set exists to prevent: scaled grew the page, the ramp, the tiles and the pivot around a bar that stayed 54 dp.