Even though this is a long sleeve, but it's fine for our weather, suitable for casual and formal.
It's made of lightweight and stretchable cotton spandex.
I'm UK8/Size S, 156cm, I'm wearing size M for this, as I prefer a slightly loose cut for tee shirt lately, size S will be well fitting for me.
S: length 55cm, bust 66-82cm, waist 62-66cm
M: length 56cm, bust 70-88cm, waist 66-70cm
L: length 58cm, bust 74-95cm, waist 70-76cm
XL: length 60cm, bust 82-105cm, waist 78-80cm