For a standard double bed (140x190 cm or 140x200 cm), two duvet cover sizes are generally recommended: 200x200 cm or 240x220 cm.
The double duvet cover in 200x200 cm offers a more precise fit to the dimensions of the bed, with minimal drop.
The duvet cover 240x220 cm, for its part, offers a greater drop on each side of the bed, which is often preferred for more comfort and a more generous aesthetic.
For Queen Size beds (160x200 cm), a duvet cover of 240x260 cm is ideal.
Finally, for King Size beds (180x200 cm), a duvet cover of 260x240 cm or 280x240 cm is recommended.