Adult jumping spiders usually stay pretty small, but the very largest species can reach about 1 inch (around 2.5 cm) in body length.

Typical size range

  • Most common jumping spiders you see around homes and gardens are about 5–10 mm long (roughly 0.2–0.4 inch).
  • Across the whole jumping spider family (Salticidae), body length ranges from about 1–25 mm (0.04–0.98 inch).
  • Many field guides and encyclopedias describe them as generally 2–22 mm, which fits within that overall range.

Biggest species

  • Some of the largest pet and “showcase” species, like Phidippus regius (regal jumping spider), can reach around 20–25 mm (close to 1 inch).
  • The largest known jumping spiders, such as Hyllus giganteus , are also in the 2.5 cm (about 1 inch) body-length range.

How big are “normal” house jumpers?

  • The bold jumping spider (Phidippus audax), a common North American species, typically tops out around 13 mm (about ½ inch).
  • Many small striped or wall-dwelling jumpers (like Salticus scenicus) are closer to 8–12 mm, so they look tiny compared with their big relatives.

Quick Scoop

  • Usual size: about 5–10 mm long.
  • Overall family range: 1–25 mm (up to about 1 inch).
  • Largest “giant” jumpers: around 2–2.5 cm body length.

Information gathered from public forums or data available on the internet and portrayed here.