</figure>
-For example, [type](/glossary/type) with a physical size of 72 points viewed from a distance of 10 inches has a perceived size of about 5.72°, or 343 arcminutes. To match that same perceived size from 1.5 times the distance (15 inches away), you’d have to also increase the physical size by 1.5 times (to 108 points).
+For example, [type](/glossary/type) with a physical size of 72 points viewed from a distance of 10 inches has [a perceived size](https://web.archive.org/web/20240505051650/https://sizecalc.com/#distance=10inches&physical-size=72points&perceived-size-units=arcminutes) of about 5.72°, or 343 arcminutes. To match that same perceived size from 1.5 times the distance (15 inches away), you’d have to also [increase the physical size](https://web.archive.org/web/20240505051650/https://sizecalc.com/#distance=15inches&perceived-size=343.488627arcminutes&physical-size-units=points) by 1.5 times (to 108 points).
Angular measurements like this are the basis of [visual acuity](https://en.wikipedia.org/wiki/Visual_acuity) tests you may be familiar with from the [eye charts](https://en.wikipedia.org/wiki/Eye_chart) at your optician’s office. They also inform standards about the design of traffic signs and other critical text-based information. This way of measuring perceived size is among the most relevant when it comes to how we experience text in the real world because it’s directly related to how quickly and easily we can decipher letters and words.
- Be more observant about how different typefaces may require changes in size specifications due to differences in their design or production.
- Perhaps more important than anything, test the sizing logic on a variety of screens and devices to ensure it works reasonably well in as many environments as possible.
-The more knowledgeable and thoughtful designers are to the intricacies of typographics size, the better the experience can be for readers.
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+The more knowledgeable and thoughtful designers are to the intricacies of typographics size, the better the experience can be for readers.