This means that two women with similar heights and weights may have completely different leg shapes. One may naturally have a visible gap between her thighs, while the other may not. Both can be perfectly healthy.
Why Do Some Women Have a Thigh Gap While Others Do Not?

The answer begins with anatomy.
The pelvis and femur bones help determine how the legs are positioned. Differences in bone structure can affect whether the thighs touch when a person stands naturally.
Body composition also plays a role. The amount and distribution of muscle and fat around the thighs can influence their appearance, although these factors do not determine the outcome on their own.
Genetics contribute to these natural variations, too. That is why a thigh gap is not something every woman can achieve simply by losing weight or following a particular exercise routine.
Trying to force the body to develop a specific shape can lead to unhealthy dieting, excessive exercise, and unnecessary frustration.