What is the right size of a duvet?

The duvet should at least be 20 cm longer than the body size. If it is shorter, you will not enjoy restful sleep because your feet might get cold.
 
The width of the duvet should not be too small: The comfort size of 155 x 220 cm for a single duvet will be adequate for most people, but many sizes are available also double size, king size etc. and sizes for babies and juniors.

 

 

Quelle
Verband der Deutschen Daunen- und Federnindustrie e.V.