T Square - Metric

I printed on PLA+ with a 0.4 mm nozzle at 0.12 mm layer height, but a 0.2 mm layer height will be ok (the divisions and digits are recessed 0.2 mm). 

Best printed digits facing down to eliminate supports, but beware plate glue adhering to the bottom and wiping it into the recessed areas like I did.

Compared to L-squares, T-squares save the flipping over when close to the ends.  However T-squares don't allow getting close to the ends if material isn't loose, like a wall stud.

Also flippable L-squares with a centered blade aren't ideal for printing, requiring supports if printed flat, or weak if printed vertically.