When selecting a Hesco barrier to withstand small explosions, several factors should be considered:

Explosive Yield: The type and quantity of explosives directly determine the required level of protection.
Fragmentation Threat: The size and speed of fragments generated by the explosion will also affect protection requirements.
Installation Environment: Terrain, geological conditions, and climate can affect the stability of the Hesco barrier.
Protection Target: The value and importance of the personnel or facilities to be protected.
Generally, for small blast protection, it is recommended to choose Hesco barriers with the following dimensions:

Height: At least 4 feet (approximately 1.2 meters) to provide sufficient protection height.
Width: At least 4 feet (approximately 1.2 meters) to enhance structural stability.
Length: Adjust flexibly according to the protection range and site conditions, but generally not less than 8 feet (approximately 2.4 meters).
Fill Material: It is recommended to use fill materials with high density and uniform particle size, such as sand or soil.
Additionally, consider the following:

Layers: The protective capability can be enhanced by increasing the number of layers of Hesco barriers.
Reinforcement: The blast resistance can be improved by adding steel plates, concrete, or other materials inside the Hesco barrier.
Anchoring: Ensure that the Hesco barrier is securely anchored to the ground to prevent it from being overturned by the blast shock.
It’s important to note:

No Absolute Safety: No protective measure can completely eliminate the risk of damage caused by an explosion.
Professional Assessment: It is recommended to consult with an explosion protection expert for evaluation and design based on specific circumstances.
Factors Affecting the Blast Resistance of Hesco Barriers:

Material Quality: The material and welding quality of the Hesco barrier’s wire mesh directly affect its strength.
Construction Quality: The installation quality of the Hesco barrier also affects its protective effect.
In Summary:

Choosing the right size Hesco barrier to withstand small explosions requires considering multiple factors and there is no one-size-fits-all answer. It is recommended that you consult with a professional for the most suitable size and protection scheme based on your specific circumstances.

If you can provide more detailed information about the explosive threat, such as the type and quantity of explosives, distance, etc., I can provide more accurate recommendations.