The effect of droplet size on surface tension is analyzed using Gibbs thermodynamic theory and previous results on superficial densities. The conclusion is that surface tension decreases with decreasing droplet size over a wide range of conditions. Approximate rates of decrease are also obtained, with significant changes occurring for very small drops. These findings are important for understanding the behavior of small droplets, as surface tension plays a crucial role in their behavior. The paper discusses the derivation of a relationship between surface tension (σ) and droplet radius (r) using Gibbs theory. It shows that surface tension decreases with decreasing droplet radius, and provides an expression for this dependence. The quantity Γ/(γ' - γ'') is interpreted, showing its dependence on the distance δ from the surface of tension to a dividing surface where superficial density vanishes. For plane surfaces, this quantity is constant, but for curved surfaces, it changes with droplet size. The application of the derived relationship shows that surface tension decreases with decreasing droplet radius. Numerical results indicate that surface tension decreases significantly for small droplets, with values as low as 30% for droplets with a radius five times the distance δ. However, direct experimental measurement of this decrease is difficult due to the small size of the droplets required. The paper concludes that while the results are important for understanding small droplet behavior, they may become less reliable for very small droplets. The methods used are appropriate for larger droplets, but for very small ones, different approaches, such as molecular mechanics, may be more suitable. The results are considered significant for understanding surface tension effects in various applications, including laboratory, engineering, and atmospheric contexts.The effect of droplet size on surface tension is analyzed using Gibbs thermodynamic theory and previous results on superficial densities. The conclusion is that surface tension decreases with decreasing droplet size over a wide range of conditions. Approximate rates of decrease are also obtained, with significant changes occurring for very small drops. These findings are important for understanding the behavior of small droplets, as surface tension plays a crucial role in their behavior. The paper discusses the derivation of a relationship between surface tension (σ) and droplet radius (r) using Gibbs theory. It shows that surface tension decreases with decreasing droplet radius, and provides an expression for this dependence. The quantity Γ/(γ' - γ'') is interpreted, showing its dependence on the distance δ from the surface of tension to a dividing surface where superficial density vanishes. For plane surfaces, this quantity is constant, but for curved surfaces, it changes with droplet size. The application of the derived relationship shows that surface tension decreases with decreasing droplet radius. Numerical results indicate that surface tension decreases significantly for small droplets, with values as low as 30% for droplets with a radius five times the distance δ. However, direct experimental measurement of this decrease is difficult due to the small size of the droplets required. The paper concludes that while the results are important for understanding small droplet behavior, they may become less reliable for very small droplets. The methods used are appropriate for larger droplets, but for very small ones, different approaches, such as molecular mechanics, may be more suitable. The results are considered significant for understanding surface tension effects in various applications, including laboratory, engineering, and atmospheric contexts.