Note: the following is based on the Windows 8 Release Preview (build 8400) and may not accurately reflect the final version of Windows 8. I’ll update this post if there are changes in future builds.

Updated: The fonts have been updated in the public beta (Windows Consumer Preview) and release candidate (Windows Release Preview) and I’ve changed the tables below to reflect this. I was also made aware of some additional information about changes to Segoe UI, including new stylistic sets and support for ligatures: you can read more at Subacme.

Further to my earlier post about Segoe UI Light in Windows 8, I’ve done some more research into the changes to the Segoe family of fonts. The Fonts class in the .NET Framework was helpful for retrieving information about the fonts.

First off, Segoe Print and Segoe Script and their bold variants have not been modified and are still labelled version 5.02 and 5.00, respectively. All existing variants of Segoe UI have been updated, and there is one new variant: Segoe UI Semilight. The latter is in fact used as the caption and small caption font in Windows 8 – Windows Vista and Windows 7 used Segoe UI (Regular). The Windows Phone 7 platform includes Segoe WP Semilight, and Segoe UI Semilight seems to be a superset of that font.

Apparently new in the Windows 8 Release Preview are three italic variants: Segoe UI Light Italic, Segoe UI Semibold Italic and Segoe UI Semilight Italic.

The following tables summarise the differences in glyph and character counts between the Windows 7 and Windows 8 versions of the Segoe UI font family:

Segoe UI Regular

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.01	5.12	5.16	5.24
Glyphs	2899	4281	4490	4516
Characters	2658	3283	3423	3404

Segoe UI Bold

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.01	5.12	5.15	5.24
Glyphs	2899	4290	4428	4442
Characters	2658	3283	3421	3401

Segoe UI Italic

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.01	5.10	5.15	5.22
Glyphs	2381	2478	2597	3077
Characters	2130	2180	2299	2525

Segoe UI Bold Italic

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.01	5.10	5.15	5.22
Glyphs	2381	2478	2597	3077
Characters	2130	2180	2299	2525

Segoe UI Light

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.00	5.12	5.15	5.25
Glyphs	2380	4036	4178	4236
Characters	2131	3090	3230	3211

Segoe UI Light Italic

	Windows 8 Release Preview
Version	5.22
Glyphs	3089
Characters	2525

Segoe UI Semibold

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.00	5.12	5.16	5.24
Glyphs	2380	4089	4228	4242
Characters	2131	3144	3231	3211

Segoe UI Semibold Italic

	Windows 8 Release Preview
Version	5.22
Glyphs	3089
Characters	2525

Segoe UI Semilight

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	N/A	5.12	5.15	5.24
Glyphs	N/A	4034	4175	4189
Characters	N/A	3090	3230	3210

Segoe UI Semilight Italic

	Windows 8 Release Preview
Version	5.23
Glyphs	3089
Characters	2525

Segoe UI Symbol

	Windows 7	Windows 8 Developer Preview	Windows 8 Consumer Preview	Windows 8 Release Preview
Version	5.00	5.33	5.46	5.55
Glyphs	3090	5122	6785	6846
Characters	2864	4547	5092	5217

Supported Unicode Blocks

For further information about which Unicode blocks are supported by the Segoe family of fonts, you can download my extended analysis here:

segoe-analysis.7z
2,825 bytes; SHA-1: DFFA40934DB3305054C40AF3FD6E7224F5CF1EFB