Adidas Tubular Runner

[yupimthatgirl]

Im planning to buy a tubular runner, but I dont know if the seller is telling the truth that he is selling an authentic one. Can you give me some advice on how to spot the fake one from an authentic?? Thank you

 

[orangemonk]

it fits small.

my actual shoe size 10.5
my nike size 11
my tubular runner size 10