I also hate to disagree, but by industry standards the timing length of both the 15x1 and DBx1 is 33.9mm.
Timing length is from the top of the shank to the top of the eye. Total length can be different due to tip differences.
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Originally Posted by
path49
I don't like to disagree but, DBx1s are shorter than 15x1s....approx. 1.5 mm shorter. I thought they were & I just compared them...my serger takes DBx1s so I had some to compare.