<P> A child's size zero is equivalent to 4 inches (a hand = 12 barleycorns = 10.16 cm), and the sizes go up to size ​ 13 ⁄ (​ 8 ⁄ in, ​ 25 ⁄ barleycorns or 21.59 cm). Thus, the calculation for a children's shoe size in the UK is: </P> <Dl> <Dd> child shoe size = (3 × last length in inches) − 12 (\ displaystyle (\ mbox (child shoe size)) = (3 \ times (\ mbox (last length in inches))) - 12) </Dd> </Dl> <Dd> child shoe size = (3 × last length in inches) − 12 (\ displaystyle (\ mbox (child shoe size)) = (3 \ times (\ mbox (last length in inches))) - 12) </Dd> <Dl> <Dd> child shoe size ≈ (3 × heel to toe length in inches) − 10 (\ displaystyle (\ mbox (child shoe size)) \ approx (3 \ times (\ mbox (heel to toe length in inches))) - 10) </Dd> </Dl>

Which is bigger us or uk shoe size