Could be a dress for Madsie instead of a blouse. So easy. Cut 2 rectangles and 1 long scarf piece (or just use wide ribbon). Make a "tube" at the top of the 2 rectangles, then pull the ribbon/fabric through and knot. Sew sides up.
If you have long arms (like me) and a bunch of long-sleeved tees that don't fit after one wash and dry, you're gonna love this idea. DIY – Long sleeves to short. adding long sleeves to a short-sleeved shirt HAHAHA