Some brands of hard-shell guitar cases include Gator, Road Runner, SKB and HumiCase. Many guitar manufacturers such as Jackson, Gretsch, Gibson and Schecter also offer their own cases, designed to fit specific guitar models.
Hard cases are available for both electric and acoustic guitars of all shapes and styles. Many cases made by third-party manufacturers such as SKB fit a basic shape or type of guitar, such as a dreadnought-style acoustic guitar, a classical guitar or a thin-body acoustic. Hard-shell electric guitar cases may also take on a basic guitar shape, such as a flying V case or a Stratocaster-style case.
Some cases fit several similar styles of guitar bodies, making them more versatile. Cases made by companies such as SKB and Gator may fit more than one make and model of guitar. The actual case shape may be rectangular on the outside with foam inserts that are either set in place or movable so you can customize the fit to your own guitar.
Guitar manufacturers such as Martin or Taylor offer cases designed to fit many of the company's own guitars. These cases may be offered with a new guitar purchase, or sold separately through the manufacturer's website or from a store that carries the brand.