google-fonts/axisregistry/optical_size.textproto

# opsz based on https://docs.microsoft.com/en-us/typography/opentype/spec/dvaraxistag_opsz
# fallbacks based on https://en.wikipedia.org/wiki/Traditional_point-size_names
# plus discussion with dcrossland@
tag: "opsz"
display_name: "Optical size"
min_value: 6
max_value: 144
default_value: 14
precision: -1
fallback {
  name: "6pt"
  value: 6
}
fallback {
  name: "7pt"
  value: 7
}
fallback {
  name: "8pt"
  value: 8
}
fallback {
  name: "9pt"
  value: 9
}
fallback {
  name: "10pt"
  value: 10
}
fallback {
  name: "11pt"
  value: 11
}
fallback {
  name: "12pt"
  value: 12
}
fallback {
  name: "14pt"
  value: 14
}
fallback {
  name: "16pt"
  value: 16
}
fallback {
  name: "17pt"
  value: 17
}
fallback {
  name: "18pt"
  value: 18
}
fallback {
  name: "20pt"
  value: 20
}
fallback {
  name: "24pt"
  value: 24
}
fallback {
  name: "28pt"
  value: 28
}
fallback {
  name: "36pt"
  value: 36
}
fallback {
  name: "48pt"
  value: 48
}
fallback {
  name: "60pt"
  value: 60
}
fallback {
  name: "72pt"
  value: 72
}
fallback {
  name: "96pt"
  value: 96
}
fallback {
  name: "120pt"
  value: 120
}
fallback {
  name: "144pt"
  value: 144
}
description:
  "Adapt the style to specific text sizes, specified in Points. At smaller"
  " sizes, letters typically become optimized for more legibility, with loose"
  " spacing/kerning and thicker strokes with less detail. At larger sizes,"
  " letters are typically optimized for headlines with thinner strokes and"
  " more detailed forms, and more extreme weights and widths. When used in"
  " CSS, this axis is activated by default, but not all products/platforms"
  " use it automatically."