On modern Gibson Les Paul Standard models, the terms "50s neck" and "60s neck" refer to the specific neck profiles that mimic the styles found on vintage Les Paul guitars from the 1950s and 1960s.

50s Neck: This profile is generally thicker and rounder, providing a fuller grip that many players find comfortable for chords and fingerstyle playing. It typically has a rounded, chunky feel, which was characteristic of Les Paul guitars produced in the 1950s. The dimensions often have a wider nut width and a deeper profile, making it appealing for players who prefer a more substantial neck.

60s Neck: In contrast, the 60s neck profile is slimmer and more tapered, offering a faster and more streamlined feel that is ideal for lead playing and fast solos. This neck shape became popular in the 1960s, reflecting the changing preferences of guitarists during that era. It usually features a flatter back and a narrower profile, making it easier to navigate the fretboard.

By offering both neck profiles, modern Les Paul Standards cater to a variety of player preferences, allowing musicians to choose a neck shape that best suits their playing style and comfort.