I want to get a tattoo on my inner arm, but am afraid it will lose shape as I lose weight. Is this true?

I've already got two tattoos, but both are on bony areas. (Top of shoulder and back bone.) I'm looking to get a third, and was thinking of putting it on the inner part of my upper arm, kind of hidden. (It's got a special meaning to me about keeping healthy.) The issue is, I'm on a long-term goal to lose over 100 pounds- Will this tattoo, if done on "flab" get distorted as my arm gets smaller, or will it just get... smaller? (It will be text.) Should I stick with getting it on something bony that doesn't lose shape? Thanks!