Figuring It Out: OSF, LF, and TF Explained
Numerals (or figÂures) can take varÂiÂous forms. The figure style you choose ought to be approÂpriÂate to the project you are workÂing on. ReadÂabilÂity is key. But which style is best for which purÂpose? There are two main forms, oldÂstyle figÂures (OSF) and lining figÂures (LF). Each can come in tabÂuÂlar and proÂporÂtional widths. See some examÂples above.
Oldstyle Figures
OldÂstyle figÂures are Arabic numerÂals varyÂing in height and posiÂtion. Some sit on the baseÂline while others descend beneath the baseÂline. The 6 and 8 are comÂmonly the tallest figÂures and the 3,4,5,7, and 9 descend below the baseÂline, while the 0, 1, and 2 are roughly the same height of the lowÂerÂcase letÂters. This feaÂture allows them to harÂmoÂnize with other words on a page of text withÂout becomÂing a disÂtracÂtion to the reader. So oldÂstyle figÂures are most approÂpriÂate in books or any runÂning text. OldÂstyle figÂures are also known as non-​aligning figÂures, text figÂures or oldÂstyle numerals.
Lining Figures
Lining figÂures are derived from oldÂstyle figÂures. They are a modern style with all figÂures at a common size and posiÂtion and even height as the upperÂcase letÂters (but someÂtimes smaller and lighter than the capÂiÂtals). Today, most fonts use these as default. Lining figÂures sit on the baseÂline as opposed to oldÂstyle figÂures that appear at difÂferÂent heights and posiÂtions. They optiÂcally align along a height line and the baseÂline. The best appliÂcaÂtions are busiÂness reports, forms, tables or any place where alignÂment is cruÂcial. Lining figÂures are also known as regÂuÂlar numerÂals or titling figures.
Tabular Figures
TabÂuÂlar figÂures are mono-​width, they align verÂtiÂcally and thus appear in docÂuÂments that comÂpare numerÂiÂcal data in columns. Each figure shares the same width and space on both sides.
Proportional Figures
ProÂporÂtional figÂures are difÂferÂent in their total charÂacÂter width. They are spaced to fit together more like letÂters. For instance, the figure 1 is very narrow like the letter l and takes up less width than the number 6. Because their spacÂing appears more even, these figÂures are best in texts and headÂings where columÂnar alignÂment is not necessary.
Now that you know the difÂferÂences between the two figÂures styles and their two widths, you know what to buy for your parÂticÂuÂlar needs. ForÂtuÂnately, some foundries (like FontÂFont) make it simple: every figure style that has been designed for a parÂticÂuÂlar typeÂface is included in each purÂchasable packÂage. OpenÂType, though, makes it even simÂpler. Most OpenÂType fonts include all availÂable figure styles within a single font. So there’s no switchÂing between fonts to get to the right figÂures. Read more about the conÂveÂniences of the format on our new OpenÂType page.
ShareThis19 Comments:
Great quesÂtion, John. TabÂuÂlar oldÂstyle is cerÂtainly the least common variÂant. I guess it would be approÂpriÂate if you wanted to create columÂnar data that was a little more ornaÂmenÂtal or “old style” as it were. It’s more of an aesÂthetic choice in that instance.
I’ll ask the techÂniÂcal quesÂtion - how do I make my appliÂcaÂtion use each type of figÂures?
TabÂuÂlar oldÂstyle might work well in a restauÂrant or pub menu, for the prices. Or for tourÂnaÂment sports scoreÂsheet columns — darts or golf league. Some sitÂuÂaÂtion where you want an old-​timey or decÂoÂraÂtive feel but need numÂbers aligned in a grid.
Thanks for the great artiÂcle! It never quite stuck with me why oldÂstyle figÂures vary in height and posiÂtion, but readÂing that they “harÂmoÂnize with other words on a page” has made everyÂthing clear.
Thanks for the conÂcise yet very inforÂmaÂtive post! This is one of the daily things we tend to overÂlook, thanks for explainÂing it :)
ExcelÂlent artiÂcle! I was wonÂderÂing, could you perÂhaps recÂomÂmend some inexÂpenÂsive fonts for perÂsonal use? I already have the Adobe Type ClasÂsics for LearnÂing, but I want more! ;)
A couple of weeks ago I uncovÂered my old MacmilÂlan log tables from the 70s and the quesÂtion about “tabÂuÂlar oldÂstyle” made me go and fish them out of the recyÂcling bin. As I susÂpected, the bodies of the tables are all in tabÂuÂlar oldÂstyle. I supÂpose this could have been delibÂerÂate, to give readÂers a visual cue as they wanÂdered through the blocks of othÂerÂwise undisÂtinÂguished figÂures. LookÂing at the dates for this book though, it’s a 1970 reprint of an 1908 ediÂtion so I wonder if oldÂstyle figÂures might have been the only option a hunÂdred years?
When I design a more traditional-​looking pubÂliÂcaÂtion and use oldÂstyle figÂures, I will use their proÂporÂtional variÂant in the text, and tabÂuÂlar variÂant in the table of conÂtents. If there are other tables, too, espeÂcially ones with lots of numÂbers, I will probÂaÂbly go tabÂuÂlar lining.
Meta Pro might have been a better choice for illusÂtratÂing the difÂferÂences here. I believe its tabÂuÂlar lining numerÂals have stylÂisÂtic difÂferÂences (like a foot on the “1”) to comÂpenÂsate for the uniÂform spacÂing.
i found this on delicious- thanks so much for the brief intro- i actuÂally learned someÂthing great- and will chew on it for the next days…
I’ve been told that lining numerÂals should also be used when the surÂroundÂing text is all in capÂiÂtals. But I imagÂine that this applies only for “simple capÂiÂtals”, and that for small-​caps, which don’t align, old-​style numerÂals are better. Any thoughts?
Thank you all for your comÂments and perÂsonal addiÂtions to the artiÂcle.
@ Cameron Bales: That depends on which appliÂcaÂtion you’re using. If you’re in Adobe CS apps or Quark 7, it’s easy to access figure styles from OpenÂType fonts via the OpenÂType menu. In other appliÂcaÂtions, you’ll want to use PostÂScript or TrueÂType fonts, each one of which has a difÂferÂent figure style. That’s what the “TF” or “OSF” means in some font names.
@ Russel Gorton : That’s right. I for myself like to use TOSF usuÂally for smaller listÂings with no more than ten rows. Finally all these tips in my artiÂcle are not laws and the corÂrect use depends on the designer and conÂtent.
@ Dan VilÂliom PodÂlaski ChrisÂtiansen: The Adobe Fonts defÂiÂnitely are a good start. You can see our perÂsonal recÂomÂmenÂdaÂtions in the Staff Picks list. You will also find some very good hand-​picked OpenÂType fonts on our new OpenÂType page.
@ Amar: I totally agree. You also should use lining figÂures in an upperÂcase surÂroundÂing.
[…] wonder what form of numerÂals (or figÂures) is corÂrect for the sitÂuÂaÂtion at hand? This great tip from FontShop explains it all. Extended typeÂfaces will typÂiÂcally include both oldÂstyle and lining […]
[…] light-​hearted mood in keepÂing with the subÂject of the play, but I also needed a font that had oldÂstyle figÂures, eleÂgant italÂics, and a full set of ligÂaÂtures. Adobe Caslon fit the bill as a full-​featured font […]
[…] has a nice little blog post on their blog The FontÂFeed about underÂstandÂing when to use OldÂstyle FigÂures, Lining FigÂures and […]
I’ve been taking some courses in typogÂraÂphy, and I am being taught that if old style figÂures are not availÂable in a font (as in the “Mother Teresa” text examÂple above), that I should drop the point size of the lining figÂures by about 10% so that they look better (i.e., not so promiÂnent).
Any comÂments?
This is counter-​intuitive to me; I can see the difÂferÂence, though slight, in the weight of the face.
Your intuÂition is corÂrect. AdjustÂing the pt size is not a good idea because you’re always going to get a weight difÂferÂenÂtial. How noticeÂable it is depends on the typeÂface, but in genÂeral the lighter weighted numÂbers will be as much (if not more) as a disÂtracÂtion as the tall numÂbers.
This isn’t exactly relÂeÂvant, but — the recipe examÂple should have aligned the numÂbers flush right and the words for each ingreÂdiÂent flush left, with a nice em space between the two columns. This was usuÂally done in cookÂbooks, back in the day. The big cookÂing mags — Bon Appetit, Gourmet, and Food and Wine — still do.
And, as long as I’m here… while readÂing text set in a serif face, I still come across numÂbers, espeÂcially dates, set in lining figÂures but with a lowÂerÂcase letter l in place of the figure 1. The two kern difÂferÂently, and the letter is often taller and lighter than the figure. I think that’s a holdover from, again, back in the day, when many typeÂwritÂers didn’t have a number 1. We were taught to subÂstiÂtute the letter. Are most of the people inputting copy over 50?
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When would tabÂuÂlar oldÂstyle figÂures be the right choice? At first sight, it seems they’re a redunÂdant comÂbiÂnaÂtion.