Coats and shoes form the two outer anchors of a cold-weather silhouette. Their relationship is read through length, visual weight and purpose, not through a rule that both must be equally formal. Start with the real coat fastened over the layers you intend to wear.
Relate the sole to the hem
A long coat can carry a substantial boot, while a shorter precise coat may work with a lighter shoe that leaves more space around the ankle. Check whether the hem touches the boot shaft or catches when walking. With wide trousers underneath, evaluate all three elements together.
Let weather influence the choice
Rain, snow and salt change what is practical. A delicate sole or untreated surface may undermine an otherwise elegant combination after a few minutes outside. Choose grip, water resistance and room for socks first, then refine colour and shape within those requirements.
View the coat open and closed
Shoes that balance a closed coat may feel too heavy once it is open and the inner outfit becomes visible. Walk, sit and carry the planned bag in both versions. The final pairing should remain stable through the commute, protect the clothing and support the intended line without restricting movement.