<Dd> male shoe size = 3 × last length in inches − 24 (\ displaystyle (\ mbox (male shoe size)) = 3 \ times (\ mbox (last length in inches)) - 24) </Dd> <P> In the "standard" or "FIA" (Footwear Industries of America) scale, women's sizes are men's sizes plus 1 (so a men's 10.5 is a women's 11.5). </P> <Dl> <Dd> female shoe size (FIA) = 3 × last length in inches − 23 (\ displaystyle (\ mbox (female shoe size (FIA))) = 3 \ times (\ mbox (last length in inches)) - 23) </Dd> </Dl> <Dd> female shoe size (FIA) = 3 × last length in inches − 23 (\ displaystyle (\ mbox (female shoe size (FIA))) = 3 \ times (\ mbox (last length in inches)) - 23) </Dd>

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