01 — What you know
From
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Your running size in Nike
Running shoes want a thumb's width at the toe — many runners go half a size up.
02 — Your Sparx size
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Pick a size you wear in another brand, or enter your foot length. Your Sparx size appears here.
03 — The chart
Sparx running & sports
Sparx's running & sportschart isn't on file yet — sizes above are estimated from other brands.