The dimensions of a queen-size blanket can vary slightly depending on the manufacturer and country, but most U.S queen-size blankets are approximately 90 inches by 90 inches. This size is designed to fit a queen size bed, which typically measures 60 inches by 80 inches.
A queen size blanket should provide adequate coverage for the bed, with enough overhang on the sides and foot of the bed to tuck in or drape over the sides.
Some queen-size blankets may be slightly larger or smaller than 90 inches by 90 inches, so it's a good idea to check the specific dimensions of the blanket before purchasing to make sure it will fit your queen-size bed.