I've procrastinated on making this...and I have NO idea why!
Debbie Cook's latest version kicked my butt into gear and I decided to substitute my TNT Ottobre tee for Jalie 2794 with this mauve fabric from yesterday:

Since I only have about 1.5 yards of this fabric, there's no room for screwups. So I used a similar weight cream cotton jersey for a muslin. I had cut this pattern out back in May I think, before I read any reviews, so I didn't realize so many people didn't need an FBA.
I started with a size AA, which is one size above my high bust measurement. This is my first Jalie pattern, so I wanted a little extra 'insurance'. I added my usual FBA and rotated the dart into the gathered section at the armhole/bolero seam:

I was really tempted to re-trace this and forego the FBA since so many have not needed it! But I decided to throw together a muslin with what I had traced previously just to see. I think you can see above that I also added about 3/8 at the hip for my booty.
The only other alteration I made was cutting a CC sleeve since I've read many reviews of Jalie tees that complained of small sleeves. Here's my finished muslin:

Not too shabby! (if you ignore my black undergarments. We're all family, tho, right?) About the only thing I would change is maybe choosing a smaller bolero piece. The shoulder is too wide, but maybe that's part of the style? I obviously didn't bother with the center front elastic on my muslin. That should affect fit that much, so I skipped it.
It is a bit long, but this one is not hemmed, so I probably won't change the length. The sleeves are definitely slim-fitting! But they aren't tight or binding at all, and I like a slim sleeve in a tee. I sure am glad I used the CC piece though!
The minor wrinkles under the bust are more a posture/movement thing than a fit thing. They weren't there in other shots.
I'm still curious what kind of fit I would have gotten if I'd forgone the FBA and went with a full bust measurement for size. Not curious enough to retrace, though! I think I'll stick with this one.
Now I have to decide if I want to start on the mauve version now or wait until I have my plan together for the Mini Wardrobe contest. I think I'll trace one of my jackets from yesterday's post before I decide.
Parting shot...Oscar the Pom, helping mom sew:

**EDIT TO ADD** To answer a couple of comments, my muslin knit is 2-way, 25% stretch knit. My fashion fabric is 4-way 25% or more. Also, my personal preference is
not to wear a "sack". I think everyone looks better in more fitted clothes. Sometimes I like a tee to be baggy and relaxed, if I'm lounging around or cleaning house or working outside. But this tee is not one of those. I like the fitted look, and I'm pleased with how it turned out.