We stock a wide range of sneaker brands. Some of these follow the US sizing metric while others follow the UK or EU sizing metric therefore there can be slight discrepancies in how these may fit i.e. a Vans US7 may fit a bit bigger than a Nike US7.
We do our best to guide you in making the right size choice with our size chart. If you already own a pair of sneakers in the same brand, the best thing to do is to use the same sizing.