It isn't a duvet, the fabric is about 12" wide and sewn from one side of the top to the other/top and bottom. The fabric itself must be maybe 26" wide altogether and then when it is washed and ironed it is 13" and the one inch is used for hemming just below the binding. I am sorry if I didn't explain myself very well, but then no one can explain me very well anyhow!. Does this help at all? Thanks! Edie