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shihao 6487becf60 Initial commit: add all skills files

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-10 16:52:49 +08:00

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OpenXML Unit Conversion Quick Reference

Master Conversion Table

Unit	1 inch	1 cm	1 mm	1 pt	Description
DXA (twips)	1440	567	56.7	20	1/20 of a point. Used for margins, indents, spacing, page size.
EMU	914400	360000	36000	12700	English Metric Unit. Used for images, drawings, shapes.
Half-points	144	56.7	5.67	2	Used for font sizes (`w:sz`, `w:szCs`).
Points	72	28.35	2.835	1	Standard typographic unit. Not used directly in most attributes.
Eighths of a point	576	226.8	22.68	8	Used for `w:spacing` character spacing.

Common Page Sizes

Size	Width (DXA)	Height (DXA)	Width (mm)	Height (mm)
A4	11906	16838	210	297
Letter	12240	15840	215.9	279.4
Legal	12240	20160	215.9	355.6
A3	16838	23811	297	420
A5	8391	11906	148	210

Common Margin Values

Margin	DXA	Inches	cm
0.5 inch	720	0.5	1.27
0.75 inch	1080	0.75	1.91
1 inch	1440	1.0	2.54
1.25 inch	1800	1.25	3.18
1.5 inch	2160	1.5	3.81

Font Size Values (`w:sz`)

Display Size	w:sz value	Notes
8pt	16
9pt	18
10pt	20
10.5pt	21	Common CJK body size
11pt	22	Default Calibri body
12pt	24	Default TNR body
14pt	28	Small heading
16pt	32
18pt	36
20pt	40
24pt	48
28pt	56
36pt	72

Line Spacing Values

Line spacing in w:spacing uses the w:line attribute in 240ths of a line (when w:lineRule="auto"):

Spacing	w:line value	w:lineRule
Single	240	auto
1.15 (Word default)	276	auto
1.5	360	auto
Double	480	auto
Exact 12pt	240	exact
At least 12pt	240	atLeast

Note: When lineRule="exact" or "atLeast", w:line is in twips (DXA), not 240ths. So line="240" with lineRule="exact" means exactly 12pt (240/20 = 12pt).

Conversion Formulas

DXA     = inches × 1440  = cm × 567     = pt × 20
EMU     = inches × 914400 = cm × 360000 = pt × 12700
sz      = pt × 2          (half-points)

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