A hitbox is a hidden area that is needed to calculate various texture collisions with this area quickly. In 2d games, the hitbox is a rectangle, in 3d games, it is a capsule or box. One hitbox is not enough in complex models, so many different forms of hitboxes are used in the one-player model. Each hitbox has its damage multiplier, which creates vulnerable areas for killing. Although in CS: GO, we can observe the flight of a bullet, hitting the hitbox happens instantly.
In CS:GO, the hitbox of the goal has been recently changed. Previously, only two numbers were used in creating a hitbox, but with the addition of a radius value, the head's hitbox is shaped like a capsule. Many body parts still have a rectangular hitbox - feet, hands, chest.
The main problem is that each agent's skin has a different hitbox. Even in the standard faction models, there are differences - head and neck. One faction has a hitbox of 575.01 Cubic Units, another has 478.7 Cubic Units. That is a difference of 16%.
The largest head model of the SAS division. The maximum head volume in CS: GO models are 575.01 units, and the minimum is 478.1. The smallest head hitbox has the Professionals division.
For terrorists, the first place is occupied by Professionals. For the special forces side, the FBI unit has the smallest hitbox.
In second place behind the terrorist side is the Phoenix faction. They have a hitbox of 531.6 cubic units: third place - the Balkans. The second and third place for the special forces side is occupied by the National Gendarmerie, SWAT, ST6, and Combat Swimmers. The biggest head hitboxes are Partisans, Elite Squad, and SAS. Also, the neck of the SAS agents has another large hitbox. Their neck is 27% longer than that of other divisions.
Specific units are assigned to each card for each side. Maps with the smallest hitbox are Vertigo and Agency. The map assigned to the divisions with the most prominent head hitbox is Mirage.
If you are a beginner, you do not need this information at all, but if you want to have some advantage over the enemy, then when choosing skins for agents, you need to consider not only his camouflage and dimensions. Now you need to consider hitbox sizes too. The hitbox of the head of the player models is different, and this is a fact. That has been going on for over seven years.
The 16% difference is a big problem that professional players can feel. That is a problem for a game that is competitive. By having agents with the lowest head hitbox, you will often have a slight advantage over your opponent. If the developers want to fix this bug, they must update all the player models and find the default hitbox values.
