LaDuca shoes are fit off standard US street shoe sizing. When someone first puts the shoe on you want a snug fit in the width and toes to lie flat and reach the end of the shoe. The shoes loosen up as they are worn. Creasing across the toe box indicates the need for a wider width in the shoe. The shoes should be snug but not tight, LaDuca shoes should never start off painful but there should be no additional length in the shoe.