I based it loosely on a short sleeved cardigan that I like a lot, but since I didn't use a pattern and really wasn't as careful as I usually am it was a pleasant surprise that it actually came out wearable! Though I'm not sure how long it will be, 90-needles are not good for thin jersey, as I learned the hard way; the flatlock-seams in the center front and center back are lined with little holes (apparently that's what happens when you use a too thick needle in an overlock).
Hopefully I can mend it if it becomes too bad...
Like I mentioned, I made a rough copy of the puffy sleeves on the cardigan above. I can really recommend those of you who like puffy sleeves to try the method used in that cardigan to keep the puff high enough. As you can see below, high puffs are not a problem in this t-shirt!
There's a strip of elastic sewn into the sleeve, on the wrong side of the fabric, that ruffles it in the middle as well as on the sides (where all the ruffles would be normally).
It was very easy to sew, I simply pinned the elastic ends and middle to the sleeve cap and to the part of the sleeve that I wanted to ruffle and stretched it as I sewed a narrow zig-zag along the elastic on my "normal sewing machine (a Pfaff Select 3.0, you can see its top-feed-dog in the picture right behind the presser-foot, it's such a great feature!). It ruffled up nicely as I went.
I think that this elastic-method would be especially helpful in drapey fabrics, that may not have body enough to create a puff otherwise.
I made pleats rather than ruffles around the sleeve-cap, like I learned to when I made a toile for a 1930's dress-pattern before christmas.
So, what seams did I try for this test-run-project (the purpose of which was to try out different kind of seams)? Well, I did pretty well with the overlock side-and shoulder-seams, not so good on the flatlock middle front and back-seams (the fat needle punched holes along it), the coverstitch hem could have been a bit more elastic and the rolled hem around the neckl-line is a bit too rough for this particular style, but all in all... I'm pleased! The machine (a Baby Lock Evolve) is a dream to work on, and really really easy to use, even to change between coverstitch and overlock-seams, and it's no hassle at all to re-thread it (which I did quite a bit to try out the different seams).
And how many threads do I use (you can use up to eight)? Well.... three. It's a magic number, right (it's not that I'm lazy)?