Three ways height can differ
Natural growth, standing appearance, and surgical bone lengthening are different processes.
Natural bone growth
If growth plates are open
Two views, different magnifications
Bone-end detailWhole-bone contextGrowth zone near a bone end
Growth potential needs clinical assessment; age alone does not establish whether growth plates are open.
Standing appearance
Same body, different posture

Adult bone length is unchanged
Posture and shoes can affect stance or apparent height; neither lengthens adult bones.
Surgical bone change
Lengthening a divided bone

New bone forms hereSpace created by surgery
One internal-nail example, with surgical risks, rehabilitation, and follow-up.
Conceptual models. These are not growth-plate tests, anatomical measurements, or surgical plans. They do not predict eligibility or height gain.
NICHD: growth platesCleveland Clinic: postureEndocrine Society: assessment
Original LLL Blender illustrations. English-language visual.