The standard dimensions of a queen-sized comforter range from 86 by 86 inches to 90 by 94 inches. Down comforters come in slightly larger dimensions, usually measuring 90 by 98 inches.
Standard queen bedspread sizing runs longer and wider than sizing for comforters, with bedspreads measuring 102 by 116 inches. Queen blankets measure nearly the same size as comforters at 90 by 90 inches.
Consumers should account for the style of mattress when selecting which end of the size range to look in for their comforters. Standard mattresses vary from 9 to 12 inches in thickness. Premium mattresses add 4 to 5 inches to that range. Pillow-top mattresses rise as high as 20 inches.