MCM - Modern Creation Munich, ("v")

I'm torn between the x-mini and the mini stark backpack. I ordered the x-mini and all of my things fit, but I'm a bigger girl 5'3, 190 and worry it looks stupid on me. But I love the convertible option the mini doesnt have. But I can fit my full sized wallet in the mini and it looks proportional. Ugh first world problems. Anyone with both that can share some advice?