Packing list
Two columns of checkboxes, roughly seventy items on a sheet. Packing items are short words, so a single wide column wastes most of the page.
Opens with these settings already loaded. Change anything you like, then download as PDF, PNG or SVG.
Two columns, because the items are short
"Passport" and "phone charger" do not need six inches of line. A single-column list of short items leaves most of the page empty and pushes the list onto a second sheet for no reason. Two columns roughly doubles the count without making anything harder to read. Three columns is available and works for very short items, though it starts to get tight for anything longer than about twelve characters.
Tick when it is in the bag, not when you find it
The common failure is ticking items as you gather them into a pile, then loading the bag and losing track of what made it in. Tick at the moment the thing enters the bag. This sounds fussy and is the entire reason a packing list beats memory, since the list is only a record of what is packed if it is filled in at the point of packing.
Reuse the same sheet
Most people pack close to the same things every trip. Write your list once, photocopy it, and keep the copies with the luggage. A list that is rewritten from scratch each time reliably omits the item you forgot last time, which is precisely the item worth capturing. For something you run weekly rather than a few times a year, the daily checklist is laid out for repeated use.
Printing it accurately
This only measures correctly if your printer doesn't rescale the page. In the print dialog set Scale: 100%, not "Fit to page" or "Shrink oversized pages". If you're not sure it worked, print the calibration page, measure the ruler on it with a real ruler, and it will tell you exactly what your printer is doing to the page.