How should a duvet fit the bed?

A duvet should ideally be larger than the mattress, typically extending over the sides and foot of the bed to ensure adequate coverage and comfort. For a standard fit, the duvet should hang about 10-12 inches over the edges of the mattress. This overlap helps prevent cold spots and adds an aesthetically pleasing drape. Ultimately, the size of the duvet should correspond to the bed size, such as a twin, full, queen, or king.