The field (shield) is divided this way:

A - Per Pale

B - Per Fess

C - Per Bend

D - Per Bend Sinister

E - Per Saltire

F - Quarterly

G - Per Chevron

H - Tierced Per Pall

I - Bary

J - Paly

K - Bendy

L - Bendy Sinister

M - Lozengy

N - Chequey

O - Gyronny      

example

Ordinaries:

A - Pale

B - Fess

C - Bend

D - Bend Sinister

E - Saltire

F - Cross

G - Chevron

H - Pall

I - Chief

Sub-Ordinaries:

A - Two Bars

B - Two Bars Gemel

C - Two Bendlets

D - Bordure

E - Orle

F - Escutcheon

G - Annulet

H - Mascle

I - Lozenge

J - Fret

K - Flanches

L - Canton