Herdim is a German brand of musical instrument supplies based in the Markneukirchen tradition of instrument craftsmanship. The name traces back to Hermann Dick Markneukirchen — a business descended from the Dick family, which began making and trading musical instrument supplies in 1848. The Herdim name became a fixture in luthier supply catalogs distributed worldwide throughout the 20th century, and the brand is now owned by the German tool company Dictum, which maintains it as its line for instrument-making tools.

For luthiers, Herdim is best known for violin and string instrument making tools: peg reamers, peg shapers, soundpost setters, arching and outline templates (including patterns based on Stradivari and Guarneri models), and bows for violins, violas, and cellos. The tools are a staple of professional violin shops and conservatories.

Among guitarists, Herdim is recognized for its nylon guitar picks — typically marked Made in West Germany on older runs — which feature a distinctive tri-tip shape with a dimpled, stubbed gripping surface on each side. The picks come in gauges including the .63 mm yellow (111), .87 mm red (112), and .87 mm blue (113). They are most famously associated with U2 guitarist The Edge, who flips the pick over and strikes the strings with the dimpled side to produce the percussive, chime-like attack heard across the band's catalog.

Herdim has 2 products cataloged on Equipboard, including Picks & Pick Holders. Their gear is featured by 1 artist, with the strongest followings in Rock. Notable users include The Edge.