01 — What you know
From
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Your t-shirts size in Nike
An M in one brand is an L in another — and oversized cuts shift it again.
02 — Your ONLY size
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Pick a size you wear in another brand, or enter your chest. Your ONLY size appears here.
03 — The chart
ONLY t-shirts & polos
ONLY's t-shirts & poloschart isn't on file yet — sizes above are estimated from other brands.