I gave up with primark when one of my sisters, who is a size 14, had to buy a dress in a size 20 as the 14's were more of an age 14.Clothes sizes are so funny I have every size from 14-22 in my wardrobe. They all fit but I'd say my true size is more like an 18 I must have been lucky with the smaller sizes...they are peacocks and primarni so you know how accurate that is