Hello everyone!
I've been having some problems with this top that I've been trying to make~ I'm using a knit fabric thats very stretchy so it's kind of difficult to sew with. So far my biggest problem is trying to make a seamless collar 

This area to be exact:


& here's an example of a shirt that has the type of liner I would like have:


here's my top:



instead of using a liner I just sewed the seams together hiding them away but it looks so strange for a top... and I really like the idea of a liner.

how can I get this finishing touch?


any help is greatly appreciated!!!

Hi everyone.. I've been having problems when sewing together sleeves. I always get alot of bulk.. is this common when sewing sleeves? if not how can I fix these types of problems? are their any tips and tricks I could use to avoid excessive bulk?
it doesnt really effect the the outfits exterior but it makes the inside look ugly, especially since I'm plan on selling this top.

If I'm unclear please let me know and I'll explain myself better

Here's a picture of what I meant by extra bulk.. this is the inside of the sleeve.






thank you!