Basic setup for ArmA 3 Gear. You can put on uniforms, headgear like helmets and hats, then also vests.

Vest gear image is 512 x 512 resolution:

picture = "\A3\characters_f\Data\UI\icon_V_BandollierB_CA.paa";

Headgear gear image is 512 x 512 resolution:

picture = "\A3\characters_f\Data\UI\icon_H_HelmetB_CA.paa";

Uniform gear image is 256 x 256 resolution:

picture = "\A3\characters_f\data\ui\icon_U_BasicBody_ca.paa";
picture = "\A3\characters_f\data\ui\icon_U_B_CombatUniform_mcam_ca.paa";

The amount of gear/items you can put in your uniform depends on the containerClass value.

containerClass = "Supply10";

ArmA 3 default config supply values are 0, 10, 20, 50, 60, 70, 80, 90, 100, 140, 150, 180 and 200.

Here is basic uniform config, you see that we have set the Supply100 value to have lot of room in the uniform. Be adviced that default characters tend to store magazines and other gear in the vests instead.

class CfgWeapons
{
	class Uniform_Base;
	class UniformItem;
	class VTE_BDU_Olive: Uniform_Base
	{
		scope = public;
		displayName = "BDU Olive";
		picture = "\A3\characters_f\data\ui\icon_U_BasicBody_ca.paa";
		model = "\A3\Characters_F\Common\Suitpacks\suitpack_blufor_diver";
 
		class ItemInfo: UniformItem
		{
			uniformModel = "-";
			uniformClass = "VTE_aircav_pilot";
			containerClass = "Supply100";
			mass = 50;
		};
	};
};