Each in-game car body uses 1 of 6 default body types called Hitboxes. While all cars have the same stats, each Hitbox has slight differences in length, width, and height.
The 6 Hitboxes are:
Breakout
Dominus
Hybrid
Merc
Octane
Plank
Licensed cars below have a link to their blog post. Cars without links are non-branded items from Rocket League.
Breakout Hitbox
Animus GP
Breakout
Breakout Type S
Cyclone
Komodo
Nexus/Nexus SC
Samurai
Dominus Hitbox
Aftershock
Chikara/Chikara G1/Chikara GXT
Diestro
Dominus
Dominus GT
Fast and Furious Dodge Charger
Ford Mustang Shelby GT350R RLE
Guardian/Guardian G1/Guardian GXT
Hotshot
Imperator DT5
Lamborghini Countach LPI 800-4
Mamba
Masamune
Maverick/Maverick G1/Maverick GXT
NASCAR Next Gen Chevrolet Camaro (2022)
NASCAR Next Gen Ford Mustang (2022)
NASCAR Next Gen Toyota Camry (2022)
Nemesis
Peregrine TT
Ripper
Ronin/Ronin G1/Ronin GXT
Samus’ Gunship (Nintendo Exclusive)
Tyranno/Tyranno GXT
Werewolf
Hybrid Hitbox
Endo
Esper
Fast and Furious Nissan Skyline
Fast and Furious Pontiac Fiero
Insidio
Jäger 619 RS
Nimbus
R3MX/R3MX GXT
Tygris
Venom
X-Devil
X-Devil MK2
Merc Hitbox
Merc
Nomad/Nomad GXT
Octane Hitbox
Backfire
Dingo
Fennec
Gizmo
Grog
Harbinger/Harbinger GXT
Jackal
Luigi NSR (Nintendo Exclusive)
Marauder
Mario NSR (Nintendo Exclusive)
Mudcat/Mudcat G1/Mudcat GXT
Octane
Octane ZSR
Outlaw/Outlaw GXT
Proteus
Road Hog
Road Hog XL
Scarab
Sweet Tooth (PlayStation Exclusive)
Takumi
Takumi RX-T
Triton
Twinzer
Vulcan
Zippy
Plank Hitbox
Artemis/Artemis G1/Artemis GXT
Centio
Mantis
Paladin
Sentinel
Twin Mill III