Looking for nice tee shirts

[wondabar]

I'm Size 18 and would like some decent tee shirts that aren't tight around my stomach or arms. Are there any nice flattering tee shirts for larger sizes?

I've just got "slouchy" tshirts from Primark in black and cobalt blue, they are thin, and drape nicely, not tight, scoop neck, wash well and £2.50. They are perfect for me,18/20.
I've also bought from Hush, thicker material, longer, but still above elbow length sleeves, crew neck and quite a loose cut, this sort of thing www.hush-uk.com/tiger-boyfriend-t-shirt-off-white/003883-0213.html
These are casual though, I'm not sure where you'd look for something smarter.