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Slab Square Opzi 9 is a regular weight, normal width, medium contrast, upright, short x-height font.

Keywords: headlines, posters, logos, signage, packaging, techno, retro, industrial, futuristic, mechanical, distinctiveness, tech flavor, signage clarity, display impact, rounded corners, squared forms, ink traps, angular, monoline-ish.


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A squarish, slab‑serif display face with mostly uniform strokes and softened corners. Many curves are constructed from rounded rectangles rather than true circles, giving O/C/G and the numerals a boxy, engineered feel. Terminals are predominantly flat and blocky, with compact slab-like feet and occasional notch-like details that read as ink-trap-inspired cuts. Uppercase forms are wide and steady, while lowercase shows more quirky modulation (notably single-storey a and g), creating a slightly varied rhythm across words.

Best suited to headlines, posters, branding marks, and product/tech packaging where its geometric slabs and squared curves can be a defining visual motif. It also works well for signage, labels, and UI/overlay-style display text that benefits from a sturdy, engineered voice.

The overall tone feels technological and retro-futurist, like labeling on equipment or a sci‑fi interface. The squared geometry and sturdy slabs suggest precision and machinery, while the softened corners keep it approachable rather than harsh. Its idiosyncratic cuts add a playful, stylized edge that reads as intentionally “designed” rather than neutral.

The design appears intended to merge slab-serif sturdiness with squared, rounded-rectangle geometry for a distinctly technical display aesthetic. The added notch and cut details look deliberate, aiming to create recognition and texture in short phrases rather than pure neutrality in long reading.

Legibility is strongest at medium to large sizes where the interior notches and squared counters remain clear. At smaller sizes, the distinctive cuts and compact counters may visually close up, especially in dense text. Numerals follow the same rounded-rectangle logic, producing a cohesive, signage-like numeric set.

Letter — Basic Uppercase Latin
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Letter — Basic Lowercase Latin
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
Number — Decimal Digit
0
1
2
3
4
5
6
7
8
9
Letter — Extended Uppercase Latin
À
Á
Â
Ã
Ä
Å
Æ
Ç
È
É
Ê
Ë
Ì
Í
Î
Ï
Ñ
Ò
Ó
Ô
Õ
Ö
Ø
Ù
Ú
Û
Ü
Ý
Ć
Č
Đ
Ė
Ę
Ě
Ğ
Į
İ
Ľ
Ł
Ń
Ő
Œ
Ś
Ş
Š
Ū
Ű
Ų
Ŵ
Ŷ
Ÿ
Ź
Ž
Letter — Extended Lowercase Latin
ß
à
á
â
ã
ä
å
æ
ç
è
é
ê
ë
ì
í
î
ï
ñ
ò
ó
ô
õ
ö
ø
ù
ú
û
ü
ý
ÿ
ć
č
đ
ė
ę
ě
ğ
į
ı
ľ
ł
ń
ő
œ
ś
ş
š
ū
ű
ų
ŵ
ŷ
ź
ž
Letter — Superscript Latin
ª
º
Number — Superscript
¹
²
³
Number — Fraction
½
¼
¾
Punctuation
!
#
*
,
.
/
:
;
?
\
¡
·
¿
Punctuation — Quote
"
'
«
»
Punctuation — Parenthesis
(
)
[
]
{
}
Punctuation — Dash
-
_
Symbol
&
@
|
¦
§
©
®
°
Symbol — Currency
$
¢
£
¤
¥
Symbol — Math
%
+
<
=
>
~
¬
±
^
µ
×
÷
Diacritics
`
´
¯
¨
¸