In the US and UK, women’s jeans sizes start from 0 to 18+. These sizes are based on many factors such as the waist, hip, and thigh measurements.
On the other hand, standard men’s jeans sizes are more direct to their actual measurements. Most brands use the length of the waistband to determine the jeans’ size. For example, a pair of AKINGS denim in size 28 has a 28-inch waistband and its women’s jeans size would be 0 in the US and 4 in the UK.