If you’re after a fast, effective sew then I highly recommend the Tessuti Fave top (free pattern).
This is another “one size fits most” pattern, so keep that in mind when you sew it up. Because of the style it is fairly flexible. I have sewn it without any body width or length alterations, but have lengthened the sleeves to full length. This was done via the technical method of just keeping on cutting until I thought the length looked about right.
This gives you an idea of the shape of this top. One pattern piece for the front, one pattern piece for the back. The sleeves are meant to be fitted, and indeed I think that if they weren’t the volume of the tee body would just swamp you. If you wanted to make this pattern smaller or larger it would be pretty easy to either slash and spread or to fold in to make it smaller. For reference, I’m 158cm tall, and wear roughly an Australian size 12 top in RTW.
Fabric really is the key to making this top work. It needs to have loads and loads of drape. This poly/spandex from Darn Cheap Fabrics works perfectly. Lots of four-way stretch, which makes the fitted sleeves comfortable, and lots of drape so that it hangs down nicely. You really do need to choose something that flows. As you can see, I took advantage of the leftovers to make a coordinating infinity scarf. It’s rather long, so I can wear it hanging down as above, or double loop it to make it shorter as in the first photo. I don’t use a pattern for these scarves/cowls – there are plenty of tutorials out there if you need one though. I basically just sew the leftovers into a tube by stitching the long edges together, then joining the short ends together. Easy peasy!
Construction was on the overlocker (only four seams – one shoulder/arm, the other shoulder/arm, one side/underarm, the other side/underarm; it really is straightforward) and hems were stabilised with Vilesofix tape then twin needled. The neckline had the same treatment – turned to the inside and secured then twin needled. You could add a band or finish the neckline however you like. This pattern has been around for ages, and you can see my other versions of it here.