How can you reply wit if you don't admit your leg length?

Self-deprecating response, change the subject.

1, self-deprecating response: You can respond in a humorous and self-deprecating way. Haha, yes, those of us with short legs need to take two more steps to catch up with your long legs.

2, change the topic: you can change the topic and divert attention. In fact, I don't think height is the standard to measure a person. What matters is talent and quality.