Real Spiny Spider specimen encased in our proprietary developed Glow in the Dark lucite material. Unbreakable & authentic! See the Spiny Spider right on your wrist in the dark! Length of the band is extendable from (5.5 to 9.5 inches). This suits the hands all sizes. Information about this insect: Scientific name: Gasteracantha sp. Family: Araneidae Spiny spiders (Gasteracantha sp.) are only 4-10mm. in size but build strong vertical webs; live mainly in secondary forests.