Just my size panties for women are designed for women who wear a size 4 or below. Plus size panties are designed for women who wear a size 6 or above.Just my size panties usually have a narrower waistband and a shorter rise than plus size panties. They also generally have less coverage in the back and on the sides.Plus size panties typically have a wider waistband and a longer rise than just my size panties. They also generally have more coverage in the back and on the sides.If you are looking for something that provides more coverage and support, then you should go with a pair of plus size panties. If you are looking for something that is more form-fitting and comfortable, then you should go with a pair of just my size panties.