Really quick and simple collar stay. Remember to print two!

This design is parametric too, so you can easily adapt it to your shirt. Should print in just a few minutes, so you can print it while you're getting ready in the morning. No excuses for leaving the house with an uneven collar!

Typical and preselected values are 10mm wide, 60mm long, and 1mm thick. I've seen collar stays from 8-12mm wide, and I have shirts where 60mm is too long, and where a shorter collar stay would "disappear" and require tweezers to get back out.

Remember to remove before washing your shirts, especially if you're using PLA. But of course, if you're washing at low temperatures, as you should, it may not be an issue? See the benefits of washing at low temperatures: https://www.iprefer30.eu/en