C6 = 162 x 114mm (matches A6 card)
C5 = 229 x 162mm (matches A5 i.e. folded A4 card)
A7 = 133 x 184mm (matches 5 x 7" or 127 x 178mm card)
105sq = 105 x 105mm (matches 100sq card)
120sq = 120 x 120mm (matches 115sq card)
130sq = 130 x 130mm (matches 120sq card)
150sq = 150 x 150mm (matches 140sq card)
160sq = 160 x 160mm (matches 150sq card)