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# Supersized em square

Posts: 1,802

I came across this magnificent specimen recently—Sharp Type’s Carta Nueva by My-Lan Thuong, 4096 units to the em—and wondered which other typefaces have ventured into such expansive territory.

• Posts: 91
The em is a fundamental scale so this actually means the unit is ¹/₄₀₉₆ em.
• Posts: 2,044
edited December 2020
Yet another place capitalization matters...  :-)
an em: the unit.
the Em: the number of units composing the height.
(Although usage certainly varies.)
• Posts: 1,379
I use 4000 for hairline fonts
• Posts: 1,802
The linked AIGA article described it thus: “4096 units per em scale”.
I spose I should have written “4096 units to the em-square”?

But anyway—other “big em-square” fonts?
• Posts: 2,165
The em is a fundamental scale so this actually means the unit is ¹/₄₀₉₆ em.
u = 1/4096 * m
is mathematically synonymous with
u = m/4096
and
4096 * u = m

• Posts: 91
The em is a fundamental scale so this actually means the unit is ¹/₄₀₉₆ em.
u = 1/4096 * m
is mathematically synonymous with
u = m/4096
and
4096 * u = m

But the em remains constant given the same point size. So this is outline definition precision.
• Posts: 242
The linked AIGA article described it thus: “4096 units per em scale”.
I spose I should have written “4096 units to the em-square”?

But anyway—other “big em-square” fonts?
Gimlet X-Ray has 5000 units per em.

• Posts: 113
What is the main disadvantage of high UPM (let's say above 2000)? I guess font size, but maybe some other things like compatibility with some text processing apps, problems on the web, etc.?