MORE DETAILS:  Genuine nubuck is terrific - more durable and less fussy than suede.  FITTING:  Shoes vary so please compare foot length with insole measurements, allowing 3/8"+ for legwear, wiggle room, & growth - consultations always OK. 
Euro 19/US 4 = 5"
Euro 20/US 5 = 5 1/4"
Euro 21/US 6 = 5 1/2" 
Euro 22/US 6.5 = 5 3/4"