When selecting the best duvet size for a double bed, you should aim to match your mattress dimensions.
A double duvet measuring 200 x 200 cm (6'6" x 6'6") is suitable for a standard double bed.
However, you might want to consider sizing up if you prefer a more luxurious, draped aesthetic or if you often struggle with a duvet-hogging partner.
In that case, opt for a king-size duvet, which measures 230 x 220 cm (7'5" x 7'2").
Find out more about the Emma duvet sizes in our Emma 4 Season duvet review.