Are there any fans of SourceSerifPro here? I'm using it, and am thinking it needs a little extra space between the lines than what my software selects by default (11/13.6 pt), but I don't have an eye for such things (not a designer nor a typographer).

Any advice? What seemed to look good to me was a considerable bump from 13.6 pt, which makes me hesitant. Many of the comments are of the nature of "do whatever you think best", but I doubt anyone would give such advice to an intern doing work for a paying customer. Experienced judgement has value.

I'm using this font for class handouts printed on letter paper, with a fairly wide line that averages about 80 characters per line (about 5 3/8 inches).

I've lengthened my examples and provided them in a context showing the actual width of my text block. (Unfortunately, unless your monitor is larger than mine, the site shrinks the image in order to fit it.) I also labeled them in absolute units, since that seems less confusing. enter image description here

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    If you’ve got wide lines with ~80 characters per line, I’d probably go for what would be around 15%, at a guess. Around 11/15.5–16 or so. 11/14 is generally a pretty good rule-of-thumb basis for medium-length lines in body text, but you’ll need more if your lines are longer. Nov 19 '20 at 23:05
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    There are no rules. Use what you feel looks best and allows readers to easily track the next line.
    – Scott
    Nov 20 '20 at 4:28
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    @user1984717, when you talk about +10% line spacing it's important to know what you consider the default or it doesn't make sense.
    – Wolff
    Nov 20 '20 at 7:34
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    When opinion is based on experienced judgement, it is useful. And that which is useful can be correct in some sense. (A useful sense!) Not everything is math and science, some fields are art. I'll try get a more extensive example up tonight. Nov 20 '20 at 19:06
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    I agree with @Scott that as it is this question will not provide anything else than opinions because the given 3 examples are all valid options which lies within the "norm". In different settings they can be equally good. OTOH I also agree with the OP that a professional's opinion can be qualified and I would love to see more in-depth questions on this site about typography. It can't be true that everything about typography is just "a matter of opinion" and "not science". The tricky part is how to ask those questions ...
    – Wolff
    Nov 20 '20 at 23:10

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