What technique is commonly used to transition hair lengths from short to long on a hairline?

The technique that is commonly used to transition hair lengths from short to long on a hairline is clipper over comb. This method is effective because it allows for a smooth gradient between different lengths while maintaining control over the hair being cut. The comb is held at an angle while guiding the clipper along it, which easily blends shorter hair and longer hair sections.

This technique is especially useful in creating a natural-looking fade or in achieving a well-blended hairstyle where the lengths need to transition seamlessly. The precision of the clipper combined with the comb's ability to lift the hair contributes to a polished finish.

Other techniques like texturizing, point cutting, and scissor over comb have specific uses but are not as effective for the specific purpose of transitioning hair lengths in the way that clipper over comb is. Texturizing is more focused on adding movement and reducing bulk, point cutting is used to create soft edges and remove weight, and scissor over comb is typically used for precision cutting but may not achieve the same level of blending or transitioning as clipper over comb.