Yes, all forces have both size (also called magnitude) and direction. This is why forces are considered vector quantities.

Here's why:

* Size: The size of a force refers to how strong it is. For example, a push with 10 Newtons of force is stronger than a push with 5 Newtons of force.

* Direction: The direction of a force tells us which way it is acting. For example, a force pushing an object to the right is different from a force pushing it to the left.

Examples:

* Gravity: Pulls objects towards the center of the Earth (direction) with a certain strength (magnitude).

* Friction: Acts opposite to the direction of motion (direction) with a certain strength (magnitude) depending on the surfaces in contact.

* Normal force: Acts perpendicular to a surface (direction) and is strong enough to prevent an object from passing through the surface (magnitude).

Without both size and direction, we wouldn't be able to fully understand how forces affect objects. They work together to determine the motion of an object.