Is it okay to drop off the letter in the Canada post box in the weekend

A print of slot of doom to measure your CanadaPost parcels There's 3 options here: Full Print If you're print bed is big enough just do

It printed just fine at mm layer height, but you are welcome to CanadaPost Slot of Doom thingiverse There's 3 options here

canada slot Take the stress out of shipping and wondering if your oversized envelope will pass through the Slot of Doom at the Post Office! Perfect for online and Etsy

canada slot machines Canada Post Slot Sizer Postes Canada Slot of Doom Slot Measuring Indicator Letter Mail and Oversized