<p>As explained at <a href="https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/" rel="noreferrer">https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/</a> 
labels name and value have limit of 63 characters. Does anyone know what drives this limit? I am not looking for code condition but the real reason behind choosing this value.</p>

<p>As <a href="https://stackoverflow.com/users/8803619/suresh-vishnoi" title="1,427 reputation">Suresh Vishnoi</a> wrote, it is a global restriction based on <a href="https://www.rfc-editor.org/rfc/rfc1123" rel="noreferrer">RFC-1123</a>.</p>
<p><a href="https://stackoverflow.com/questions/32290167/what-is-the-maximum-length-of-a-dns-name#32294443">Here</a> is a simple explanation of this restriction.</p>
<p><a href="https://github.com/kubernetes/kubernetes/pull/1830" rel="noreferrer">There is</a>  a commit in Kubernetes which provides the validation of labels' length.</p>
