If it's a cardigan sweater, try to buy a bigger size. The first one is an X, and the last three X's (maybe a little loose). If it's not the first l of cardigan, it's ok. Just type two x's for the second one.

Li Ning sweater size reference table Let's take a look at our friends' upper body sizes. It's good for girls to wear size M, and for boys, it's 178, weighing 53kg and 67kg. It's very suitable to wear size L. Please refer to Li Ning sweater size table or consult customer service for specific size information.