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mm
Metric
mm — Millimeter
cm — Centimeter
dm — Decimeter
m — Meter
km — Kilometer
µm — Micrometer
nm — Nanometer
Imperial
in — Inch
ft — Foot
yd — Yard
mi — Mile
nmi — Nautical Mile
hand — Hand
bc — Barleycorn
Typography
pt — Point (PostScript)
pc — Pica (PostScript)
twip — Twip
Didot pt — Point (Didot)
Didot pc — Pica (Didot)
cicero — Cicero
Digital / Pixels
css px — CSS Pixel (96 PPI)
px@72 — Pixel @ 72 PPI
px@96 — Pixel @ 96 PPI
px@150 — Pixel @ 150 PPI
px@300 — Pixel @ 300 PPI (print)
px@600 — Pixel @ 600 PPI (high-res)
px@1200 — Pixel @ 1200 PPI (ultra)
Relative (em/en)
em — Em (12pt base)
en — En (12pt base)
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US Envelope Paper Sizes
US Envelope Paper Sizes
ISO 216 international paper standards: A, B, and C series.
ISO A4
210 × 297 mm
ISO B5
176 x 250
mm
ISO A4
210 x 297
mm
ISO A3
297 x 420
mm
US Envelope Paper Sizes — dimensions in mm and inches
Format
mm
inches
ISO B5
176 × 250
6.93 × 9.84
ISO A4
210 × 297
8.27 × 11.69
ISO A3
297 × 420
11.69 × 16.54