Our Lab Rat Costume is a hideous outfit that's ideal for scaring your friends this Halloween! The creepy mask has terrifying eyes and an exposed brain and looks amazing when combined with the stained jacket. Costume includes: Jacket with tail Mask The Lab Rat Costume includes a grey jacket with green stains and an attached furry chest and pink tail. The jacket has a name tag bearing the words 'Lab Rat.' Also included is a latex rat mask with a studded neck collar, scary eyes and a green and yellow brain. Medium: Chest: 38" - 40" Waist: 32" - 34" Inside Leg: 32.5" Large: Chest: 42" - 44" Waist: 36" - 38" Inside Leg: 33"