Is a Horse Stall Height of OK?

Please provide more context! I need to know what "OK" refers to in this context.

For example, are you asking:

* Is a certain horse stall height safe for a horse? This depends on the horse's size and breed, as well as its intended use.

* Is a certain horse stall height compliant with regulations? Building codes and regulations vary depending on location.

* Is a certain horse stall height suitable for a particular horse? Some horses might be more prone to injuries or have specific needs that require a different stall height.

Once you give me more information, I can help you figure out if the horse stall height is appropriate.