A pair of sleek black boots ... heels, some have buckles and some do not. A few of these pairs have some details that make them a dressier boot while others look more casual. Knee high boots ...

Penelope Chilvers has another black knee-high option in its collection. The brand's Sinatra boots are in suede and have a slightly lower block heel. Suede boots are a royal favourite look ...

Plus, with different fabrics, heel heights and colours to choose ... as some midi dresses will work much better with black knee-high boots than brown (and vice versa). When it comes to office ...