Get a refund... or keep shoes but cannot return it.
i assume they mean if you keep the shoes you cannot return it... but that sentence was structured wierd.
really depend on your foot shape and the material softness
i got my sz in the neutral greys and they actually broke in, i have 11.5 that i tried on foot that is fine initially but i already feel they will be a lil too roomy.
Still go half size up just in case, better with more space than not.
lets just put it this way, the og lows recently i wear a size 11 TTS - the slight extra room allows for thicker socks and insole swaps of my choosing. the Highs i stop taking chances and go half size up because my feet swells after wearing it for a few hours. To me, its necessary.