Information taken from Sellonline.ca. As soon as you get your login information from Canada Post.
Set up your box and envelope.
(Envelope) Lettermail Dimensions
Length: Minimum - 14 cm (5.51 in.), Maximum - 38 cm (14.96 in.)
Width: Minimum - 9 cm (3.54 in.), Maximum - 27 cm (10.63 in.)
Height: Minimum - 0.018 cm (0.007 in.), Maximum - 2 cm (0.78 in.)
Weight: Maximum - 500 g (1.1 lb.)
What options?Also noticed many options you talk about are not in the mod? why do I not see it?