If you can find clothes that fit, that proves there are cis-F your size.
If you do pass, you're still you. Open the door to the you that is comfortable; fashion these days is pretty unisex. "Femme" is something else. Lots of women can't do femme.
I stopped trying to "femme" pass, now dressing like cis-F locally, and the beach tourista cis-M. Long hair, earrings (6), tanks, T's, beach-comb cargo pants, hats, and the gender presentation becomes fluid.
I wish I could "pass" for Kiera Knightly, Nicole Kidmann -- most women so wish too!
Gender distinctions are fading fast! It's a fashion trend! I wish it would drop off, but it's still here -- I've tried beating to death . . . No luck! LMAO