am i plus sized?

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when i go to a store like forever 21, Charlotte russe, Olive ole, h&m;, I can never find any clothes that fit me and it's frustrating. I'm usually a large at other stores but at these stores, i found out i have to wear plus sized clothes. XL, 0x, (my original) 1x and sometimes 2x will fit but they are loose. . I'm 20, size 8-10 in pants, i got 36DD boobs and i'm 208 lbs. It makes me feel like i'm big. Smh. Do you consider that plus sized?