Because the quilt has a certain thickness, the size of the quilt cover needs to be moderately increased. Generally, the quilt cover is about 10 cm longer and about 5 cm wider than the quilt core. It is not good that the quilt cover is too big or too small. If it is too big, the quilt cover can't be filled with the core, and it will feel empty when used, and the core may wander around. If the quilt cover is too small, it will cause the quilt core to roll into a ball in the quilt cover, which looks awkward and uncomfortable to cover.