Standard setting has the same ratio of width to length, choose it if you do not usually have problems with either of these two measures.
LOOSE adjustment has 15mm wider than the standard instep normally choose it if you usually remains very tight. Our feet do not always have the same proportion of long wide that is usually made.
Clingy adjustment has 10mm less in width than standard instep normally choose it if you often be too loose. Our feet do not always have the same proportion of long wide that is usually made.