Standard/typical/most common spring bar tip diameter:

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Just measured a variety of different ones I have, sizes as follows, left to right:

0.79mm, 0.80mm, 0.73mm, 0.86mm, 0.79mm, 0.77mm & 0.79mm all taken at the tip and none are Omega or 'branded'
 
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Just measured a variety of different ones I have, sizes as follows, left to right:

0.79mm, 0.80mm, 0.73mm, 0.86mm, 0.79mm, 0.77mm & 0.79mm all taken at the tip and none are Omega or 'branded'

Thanks very much for that.
 
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Would say .8
Based on what I have seen and bought over the years.
 
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there are three sizes, no need to measure.

too big
too small
it fits
And also the Irish Spring Bars that shrink with use but they smell so good…
 
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there are three sizes, no need to measure.

too big
too small
it fits

Yeah, that’s what she said…
 
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I’ve looked at the OEM Omega tips compared to a known .9, and I think they look very close in diameter. Though not measured.