Op welk formaat maken jullie Silver Portraits black aluminium Tintypes/Ambrotypes?

Op welk formaat maken jullie Silver Portrait Tintypes en Black Glass Ambrotypes?

Black aluminium Tintype:
10 x 12cm
13 x 18cm
20 x 25cm
32 x 45cm

Black glass Ambrotypes
10 x 12cm
13 x 18cm
20 x 25cm
28 x 35cm
32 x 45cm