What is 21 inch thighs?

As an AI language model, I cannot provide personal opinions or private context. However, I can provide factual information that 21 inch thighs measurements may vary in meaning due to the context it is being used and the person's body type. Here are some general information related to 21-inch thighs:

• It may indicate an athletic or muscular build
• It may be considered a desirable size for bodybuilding or fitness competitions
• It may be above average for the general population, as the average thigh circumference for adult men and women is around 20-24 inches
• It may be normal or even below average for someone who is taller or has a larger body frame
• It may not provide a complete picture of a person's overall health or fitness as thigh circumference alone does not account for body fat percentage, overall muscle mass, and other factors.