I ordered a duvet cover for my king comforter (104'' W x 88'' L), but realized I ordered the queen size instead of the king size duvet cover. The dimensions of the duvet cover are 90'' W x 90'' L.

Will I be able to fit my king size comforter in the duvet cover? Or will I need to order the duvet cover in a larger size? Does anyone have any ideas about this?

Thanks!