7.5" – 10”: These smaller radii have a more pronounced curve to the fretboard, making them ideal for comfortable chord playing. Common on vintage-style necks and classic guitars.

12" – 14”: Flatter fretboards that offer a balance between comfort and string-bending ease. Popular on many modern guitars.

16”: Very flat. Excellent for lead work, low action setups, and fast playing styles. Preferred by shredders and metal players.

Compound 9.5–14” / 12–16”: Starts rounder near the nut and gradually flattens toward the higher frets. Provides both comfortable chording and smooth bending higher up the neck. A best-of-both-worlds option.