A marathon route print is the race as you ran it. Not the organiser's course map: your recording, the line your watch drew through the city, with your time and the date set under it. It works for any marathon anywhere, because it is made from your file and not from a list of races we have drawn.
Your marathon, not the course
The course is 42.195 km. Your watch will say 42.4 or 42.6, because you ran the corners wide and the GPS wobbled under the buildings, and that number is the one on the print unless you leave it off. It is your race. Why your marathon reads 42.6 km explains where the difference comes from.
Under the line: distance, your time, pace per kilometre, elevation gain, the date, and a title you write — the race name, or something better. Choose which numbers appear.
With the city, or without it
A marathon is a route through a place, and the map motif puts it there: the bridges, the river, the park at kilometre 30. Or the clean line, the shape of the course alone, which for the big city marathons is a shape people recognise. Clean line or a map behind it shows both on the same race.
The races we have already drawn
For some marathons there is a page with the course, the profile and what the file looks like afterwards: Copenhagen Half, Berlin, Amsterdam, Frankfurt, Valencia, and more on Races. They are context, not a requirement. A marathon that is not listed prints exactly the same way, from your recording.
After the race
The file is on your watch and on Strava the moment you stop the clock. Export it from strava.com with Export GPX (the guide) or connect the account in the editor and pick the race. If the recording started early or ran on after the finish, the crop in the editor trims it to the race itself.
A finisher's gift
The one thing a marathon finisher does not already have. You need their file: they export it in a minute, or, if the activity is public on Strava, its page has a download button. What to give after the race and a gift for someone's first marathon.
Sizes, paper, frame
A marathon has room at 50×70 cm; 30×40 works for a simpler course, 70×100 for a wall. Museum 250 gsm or Classic 170 gsm, from 319 kr for the route print; framed in white, black, wood or dark wood from 799 kr. Two to four working days to make, shipped in Denmark and the EU.
The first and last 500 metres are trimmed, which on a marathon removes the start pen and the finish chute and nothing else. Every way to print a route is on Strava prints.