H J Hall Immaculate long knee length mens socks, 11-13 UK Mid-Grey HJ77. Composition wool, polyamide and elastane mix. These are the original Immaculate long knee length socks by HJ Hall and now the market leader. With its patented design and extensive range offering a wide variety of colours, yarns and patterns, suitable for everyone whatever their age or gender. Approximate length from heel to top of sock between 41 to 45cm.