Amazing high quality duvet cover by E Braun & co New York. It would take a duvet 86" wide 96" long so I would say its US Queen maybe? (overall size is 91" wide and 99" long as it has a 3" border). Please check your own requirements before buying as I am not familiar with USA bed sizes! In pure white cotton - so soft and fine must be a super high thread count! It has never been used but has been in storage in a box for a few years I notice a few scuffs and spots (see last pic) so best to launder and freshen before use.