Proper Height for a Strop?

Is there a proper height to hang a strop, and if so, what is the rule?

For me the middle hinge on a door. Others will differ. That allows right left swing action from my elbow. I would start at the elbow height or belt level of your body.
JMO, YMMV
~Richard

No, not really. As long as it is comfortable for you and your stropping is effective it’s all good.

Thanks for your help!

Like RezDog said: whatever works for you. For me - it's doorknob height. I usually strop when sitting down, so it's actually chest-high.

Many have their strop hooks at counter level height, but it's whatever you like really. The old house I live in had a hook at eye level, so that's what I've always used.

About belt buckle level for me. Get the strop level with the ground and feels comfy to me.

I'm with gasman, although I like a slight incline for whatever reason at the same height.

Approximately waist high is the general rule. It is a matter of ergonomics.

I like anything between waist and chest height, anything higher or lower isn't as comfortable.

I like mine lower than my waistline, I just prefer to strop on a downward angle, there's no right or wrong it's whatever angle you feel comfortable with would be my answer.

Whatever works for the individual. Everyone's arms are different lengths which changes the fulcrum points. I personally prefer my strop to be secured to the wall at the height that my thoracic region meets my abdominal region. I hold the strop at my waistline. Each to his own. ;)

Belly button height pulled slightly upward

I like my strop about half way between my waist and my shoulder. I have it attached to a towel bar in the bathroom . Actually a short elastic tie is hooked between the towel bar and the strop. This allows me to strop slightly upward towards the handle. The most important thing is to be comfortable and keep the blade in total control. It takes time to learn how to use a strop. Be careful and do not rush learning.

I started with my strops at about shoulder height or a little higher. Anything else feels weird for me now.
It's just a matter of what you get used to. Any angle will work. As long as you keep the razor flat to the strop, it's all the same as far as the razor is concerned.