So, after I gained the weight, and then I accepted that I gained the weight, I went through my patterns (and acquired more patterns) with an eye on larger sizes than I had used in the past. But. Now that I'm losing weight, it hasn't quite clicked with me that I should be using smaller size patterns (especially since my waist size, while smaller, is still the same as my also-smaller bust size.)
Which meant I happily sewed up McCall's 6947 from 1963, thinking, oh, since it's vintage, it will have a slimmer fit, since clothes in general had less ease back then
And I also knew that was the older range of sizing, so that was also playing into the "it will be smaller" thinking, so much so that I didn't really register the B38 measurement. I'm not B38 now. I'm B36. Just enough to make a difference.
But! It's still fine.
Really.