I can't stop ordering these jackets.  My tri and bicepts are somewhat big, but these fit great and aren't snug at all.  I ordered the 3XL but it seems equivalent to a size 12/14 for me.  I dress somewhat casual for work - but I throw one of these on and the outfit suddenly becomes business casual.  I love that the material isn't ribbed - just a plain silk/Chiffon blend.  I keep ordering cause they're so cute, easy to iron and makes my work oufits pop.  The other brands have that ribbed material .....eeelk, but JJ Perfections are Perfect!  I have at least 10 already.  Will order more.