I am in the same boat. Started transitioning about 6 months ago now. I. too. have seen changes. I am a tight 38 under the breasts and about 42 around the widest part. I have become a 40B (according to online calculators) in that time. That thrills me. Can’t tell under loose shirts but anything tighter they are noticeable. Don’t need a bra for support yet, but I keep hoping. I am also seeing curves around the ribs and my gender specialist thinks I will gain some booty. Like you I measure every month. Seems kind of anal but when you look at yourself in the mirror everyday it’s hard to notice changes. Measuring helps with that as well as monthly pictures. Compare month 1 to month 6.