Martelli Half Square Triangle Templates
 

Has anyone used them? Do you like them? Are the sizes listed the actual size of the square? Or the size the finished square will be?

Is there a better option/method?

Sorry—can’t tell you about the Martelli. Still use my Easy Angle.

what were the sizes? if they included seam allowances, like 1/4 inch all around, then they are the unfinished size. when all sewn together, you will get the size stated in the pattern I would think. good luck.