324 x 229 mm - ( C4 / A4 Size ). 229 x 162 mm - ( C5 / A5 Size ). 162 x 114 mm - ( C6 / A6 Size ). 457 x 330 mm - ( C3 / A3 Size ). 220 x 110 mm - ( DL Size ). Board Backed Envelopes. All Board Envelopes - White.
eBay