How Big Do Skinks Get? Skink Size Chart and Growth Guide

How big do skinks get? It depends on which of the roughly 1,275 species in the skink family, Scincidae, you mean. A five lined skink rarely tops eight inches.

A full grown blue tongue skink can be twice that length and weigh more than a pound. At the far end sits the monkey tailed skink, the giant of the family, which can reach about 30 inches from nose to tail tip. Scincidae is spread across Southeast Asia, Australia, and warm regions worldwide, producing huge variation in size.

The chart and sections below answer how big skinks get, species by species. It also covers how fast skinks grow, and answers common questions like whether skink tails grow back once they are lost.

Skink size chart: smallest to largest

Skink size is not one single number. A large skink from one region can look small next to a different species from another continent. The table below lines up the skink sizes people ask about most, from a backyard five lined skink to the giant monkey tailed skink.

A few caveats belong with that table. Fire skink length is widely repeated among keepers. No single authoritative source gives an exact maximum, so treat that figure as a general range.

The five lined skink and broadhead skink numbers come from detailed wild population studies. Pet trade species like the blue tongue skink and monkey tailed skink show more variation between individual animals and breeding lines.

How big do blue tongue skinks get

Blue tongue skinks, genus Tiliqua, are the skink most people picture when they think of a large skink kept as a pet. The San Diego Zoo Wildlife Alliance fact sheet on the eastern blue tongued skink gives an average total length of about 17.7 inches. The maximum is near 23.6 inches.

Snout to vent length runs 11.8 to 12.6 inches, and females run slightly longer than males. Care guides commonly quote 15 to 24 inches, which fits those figures.

The northern blue tongue skink specifically reaches up to 22 inches snout to tail. Its average is closer to 17 inches, with a typical weight of 10 to 18 ounces.

Species level research paints a slightly different picture. Data compiled by Animal Diversity Web puts the average Tiliqua scincoides at only about 13 inches and 17 ounces. That is well below the maximum figures many care sheets quote.

That gap likely reflects an averaged dataset across many individuals rather than a true ceiling. Both numbers are worth knowing: a typical full grown skink, and the largest end of the range keepers actually see.

Blue tongue skinks are consistently among the larger members of the family either way. Their stout bodies and short legs make them look even bulkier than a tape measure suggests. For subspecies details and full size comparisons, see our blue tongue skink guide.

How fast do skinks grow

Growth speed varies as much as final size does. Blue tongue skinks grow the fastest of the commonly kept species. Newborns measure only about 5 inches and half an ounce.

With steady feeding, a blue tongue skink can reach full adult size in under a year. That pace surprises a lot of first time keepers who expect a slower reptile.

Wild North American skinks take much longer to answer how big do skinks get in their own case. Five lined skink hatchlings emerge at roughly 2 to 2.5 inches. They do not reach sexual maturity until 2 to 3 years after hatching.

Broadhead skinks follow a similar pattern. They reach reproductive maturity at around 3 inches in length, rather than sprinting toward adult size the way a captive blue tongue skink does.

Diet, temperature, and enclosure size all shape how quickly a full grown skink lizard reaches its final length. A juvenile kept too cool or underfed will grow slower than the ranges above suggest. Our skink diet guide and enclosure guide cover the setup that supports normal growth.

What is the biggest skink?

The monkey tailed skink, Corucia zebrata, is the largest skink most sources point to. It is easily the biggest species anyone keeps as a pet. It settles the question of how big can skinks get better than any other animal in the family.

Adults reach about 30 inches total length. The prehensile tail makes up roughly half of that. Unlike most skinks, it is almost entirely arboreal, living in the forest canopy of the Solomon Islands.

It is also one of the few herbivorous skinks. It feeds mainly on leaves, fruit, and other plant material at dawn and dusk, rather than hunting insects like most large skinks do.

Monkey tailed skinks live in bonded social groups that defend a shared territory. Females carry their young for roughly six months before giving birth to one or two large offspring. Full details are in our monkey tailed skink care guide.

Among smaller pet species, the fire skink and five lined skink sit at the other end of the size chart. Both stay well under 16 inches as adults, proof that not every big skink is actually that big.

Do skink tails grow back?

Yes. Skinks defend themselves through speed, camouflage, and a trick called autotomy. The tail detaches on its own when a predator grabs hold of it.

This shows up across the family, from wild five lined and broadhead skinks to pet blue tongue skinks. It is one reason juvenile Plestiodon skinks have such a bright blue tail. The color draws a predator’s strike toward the tail instead of the body.

Once a skink drops its tail, a new one does grow back over time. The replacement is usually shorter and a duller color than the original, and it will never exactly match the lost section.

Losing a tail is not harmful to the skink long term. It does cost the animal stored fat. A skink that keeps its original tail often looks a little more robust than one that has regrown a new one.

None of this involves venom. Skinks as a family have no venom glands, and a skink bite is harmless even though it can startle you. For more on that, see our skink bite and venom guide.

How big are skink eggs, and do all skinks lay eggs

Not every skink lays eggs. Blue tongue skinks give live birth instead, and litter size depends heavily on the species.

Eastern and northern Tiliqua scincoides commonly produce anywhere from 5 to 25 live young in a single litter. Newborns are already about 5 inches long at birth, which is large compared with a true egg.

Egg laying skinks tell a different story, and their eggs are genuinely small. Broadhead skinks lay 8 to 13 eggs per clutch, averaging 11, and each egg weighs under 1 gram.

Five lined skinks lay a larger clutch of 15 to 18 eggs, typically between May and July. Incubation lasts 24 to 55 days depending on temperature.

Females of both species guard and brood their clutch rather than abandoning it. That is unusual among reptiles, and it likely helps protect such small, vulnerable eggs. For the full picture of nesting behavior and incubation, see our skink breeding guide.

Size and everyday care

Size drives a lot of practical decisions once you know how big your skink will get. A five inch juvenile blue tongue skink needs far less enclosure space than the same animal at 24 inches. Many keepers upgrade housing at least once during the first year.

Large skinks also eat more, need sturdier substrate, and can be strong enough to push against loosely fitted enclosure lids. Our skink care guide walks through what changes as a full grown skink settles into its adult size.

Frequently Asked Questions

How big do skinks get?

It ranges from under 9 inches for a wild five lined skink to about 30 inches for a monkey tailed skink. Most pet skinks, including blue tongue skinks, land between 12 and 24 inches as full grown adults.

What is the biggest skink?

The monkey tailed skink is the largest skink most sources recognize, reaching roughly 30 inches with its tail making up about half that length. It is also the largest skink kept as a pet.

How big do blue tongue skinks get?

The San Diego Zoo Wildlife Alliance gives an average total length of about 17.7 inches for the eastern blue tongued skink, with a maximum near 23.6 inches. Northern adults weigh 10 to 18 ounces. Animal Diversity Web’s species wide average of about 13 inches and 17 ounces shows how much individuals vary.

Do skinks tails grow back?

Yes. A skink can drop its tail when grabbed by a predator and grow a new one afterward. The regrown tail is usually shorter and a duller color than the original.

How big are skink eggs?

Broadhead skink eggs weigh under 1 gram each, and five lined skinks lay clutches of 15 to 18 small eggs. Not all skinks lay eggs at all, since blue tongue skinks give birth to live young instead.

How fast do skinks grow before they are full grown?

Blue tongue skinks grow quickly and can reach adult size within about a year. Wild North American skinks like the five lined skink grow more slowly and do not reach sexual maturity for 2 to 3 years.