Yep, Topman runs TTS.

Does topman run big?

In my experience TOPMAN sizes do seem to be a size too small to what they claim they are, same as the t-shirts you get elsewhere which they claim is "Fashion Fit".

Does Topshop run big or small?

Topshop recently extended its clothing sizes to a UK size 18 (US size 16). But plus-size shoppers aren't happy with the retailer. Topshop clothes already run small, and its expansion to a size 18 hardly caters to plus-size women.