Choose from 3" and 3.8" The KALIN'S SIZMIC GRUB Is an absolute game changer! The SIZMIC GRUB has combined a grab body with a swim bait tail. There is no other grub like it! Swim this grub on a Kalin's or Spot Stalker Jig head by itself or try it as a trailer. Perfect Swim Jig, Spinner Bait, Buzz Bait or Jig Trailer. The next generation of Grub fishing is here!!