Not all patterns or garments of the same size from the same company will fit you the same way. Why? Because of ease.

Ease is the extra amount of fabric that is put into a garment, so that you can move better, or alter the style from closely fitted to loose.

Every designer must take ease into account when making a pattern for a garment. Clothes must not only fit the body, but must have a minimum amount of ease so that you can be comfortable. With no ease, a blouse would hold you tightly in position.

In addition to wearing ease, there is also designer ease, which is the amount of extra fabric added for the style. For example, a pair of knit leggings may have no ease, but the knit fabric will stretch. A slim pair of pants made for the same size will have 2-3 inches of ease at the hips. A pair of pleated trousers may have 6 inches of ease or more at the hips to provide a full silhouette.