How much is one stride?

Could you please clarify what you mean by "one stride"? Are you referring to the distance covered by one step taken by a person, or perhaps in the context of a particular activity or sport? If it's the former, the distance can vary greatly depending on the individual's height, leg length, and walking style. In general, a stride is roughly the length of one's foot or slightly longer, but for a more accurate measurement, it would be necessary to use a tape measure or other measurement tool. Additionally, if you're looking for the stride length in a specific context, such as running or walking, it may differ slightly due to the different mechanics involved in those activities. Could you provide more context or clarify your question further?