For those who have received trapezius Botox, does the fit of your clothes change?

My shoulders tend to be raised a lot, so it’s actually kind of stressful that my neck looks short in photos.

I tried exercising and stretching, but relaxing my shoulders was harder than I thought.

So I'm looking into trapezius Botox, and I'm wondering if I just need to focus on the shoulder line.

I'm also curious if those who actually received it noticed a difference when wearing the clothes or the shoulder line.