Bracket

Also called Fillet

The curved transition where a serif meets its stem, and the difference between a Clarendon and a plain slab.

Bracket: Caslon's capitals in three sizes, each serif curving into its stem. — Caslon's capitals, 1734, William Caslon.
Public domain
Public domain: Caslon's broadsheet of about 1734, out of copyright everywhere since Caslon died in 1766; Commons tags the file public domain and a faithful photograph of a flat sheet carries no new copyright; this crop is the three lines of large capitals at the top left. Shown from outside the house on purpose: a stroke in this foundry's faces carries one width for its whole path, so a bracket, a serif flaring into its stem, cannot be cut here.
Cropped to the large capitals. Retrieved 2026-09-10.

Bracket: a line of Baskerville's roman, the serifs bracketed but lighter than Caslon's. — Baskerville's roman, 1757, John Baskerville, printer.
Public domain
Public domain: Baskerville's Virgil of 1757, out of copyright everywhere since Baskerville died in 1775; Commons tags the scan public domain and a faithful scan of a flat page carries no new copyright; this crop is three lines of the Eclogues at the page's own resolution.
Page 24 of the scan, cropped to three lines. Retrieved 2026-09-10.

Near it

Serif

Clarendon

Slab serif

What it is made of

NOT MEASURED ON THIS SHELF, and here is what it would take

the curve joining a serif to a stem. NOT answerable from the skeleton alone: a bracket is made by the stroker where two strokes meet, so it needs the stroker's own join geometry as well

THE INSTRUMENT IT WOULD NEED, and it is not an image measurement. Every glyph on this shelf is drawn from STROKES - a centreline and a width, every one a line or a circular arc. Recovering this part from a filled outline is image analysis done to get back something the house already holds in source. The measurement is a reader for those skeletons, and it would answer most of the nine at once.