Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
millimeter across
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "millimeter across" is correct and usable in written English.
It can be used when describing the size or diameter of an object, particularly in scientific or technical contexts. Example: "The lens has a diameter of 5 millimeters across, making it suitable for compact devices."
✓ Grammatically correct
News & Media
Science
Science & Research
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
9 human-written examples
It was less than a millimeter across, perhaps the size of a large grain of sand.
News & Media
So preservation that is good enough to record the impressions of scales on skin that are a few millimeter across, many not be fine enough to preserve tiny feather filaments that are a fraction of a millimeter across.
News & Media
Just a millimeter across and practically immobile, the snail, Zospeum tholussum, makes its home in a hot, humid cave within the Lukina Jama-Trojama cave system.
News & Media
After that, he plans to build something like the battery-powered glucose meter used by diabetics, but on a disposable chip, employing flexible circuits printed with metal-infused ink and light-emitting diodes less than a millimeter across.
News & Media
The conductors are built up from individual strands less than a millimeter across.
Science & Research
To build their macro-sized quantum processors, the Yale researchers evaporated aluminum onto a sapphire surface to create two conductive spots a third of a millimeter across.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
50 human-written examples
After gathering data on 738 melanoma patients and 1030 nonmelanoma patients, Tucker's team found that subjects with more than 100 small moles--2 to 5 millimeters across--had twice as high a risk of melanoma as did people with fewer moles.
Science & Research
Bill McInnis, Reebok's managing director for advanced concepts, said the 1988 model cells measured 5 millimeters across; the 2008 model cells are 20 to 25 millimeters across.
News & Media
It is no bigger than 0.0002 inches or 0.005 millimeters, across.
News & Media
After a while, clear circular spots a few millimeters across had appeared in the agar, suggesting that something was munching away at the coccobacilli.
News & Media
The bigger vessels -- anything more than two or three millimeters across -- are tied off or sewn shut at two points and then cut in the middle.
News & Media
Expert writing Tips
Best practice
When describing dimensions in technical writing, use "millimeter across" or similar phrases to provide precise measurements for clarity and avoid ambiguity.
Common error
Ensure you consistently use millimeters throughout your description, rather than switching between millimeters and other units of measurement which can confuse the reader.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "millimeter across" functions as a descriptive adjective modifying a noun, specifying the size or diameter of an object. Ludwig shows it's used to quantify dimensions in various contexts.
Frequent in
Science
30%
News & Media
35%
Science & Research
35%
Less common in
Formal & Business
0%
Encyclopedias
0%
Wiki
0%
Ludwig's WRAP-UP
The phrase "millimeter across" is used to precisely describe the size or diameter of an object, frequently found in scientific, technical, and news contexts. Ludwig's analysis confirms its grammatical correctness and usability, suggesting that it's a common way to quantify dimensions. While "millimeter in diameter" and "millimeter wide" serve as alternatives, the best choice depends on the context and the desired level of specificity. To maintain clarity in technical writing, consistency in unit usage is crucial. In short, "millimeter across" provides a clear and concise method for specifying small dimensions.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
millimeter in diameter
This alternative specifies that the measurement refers to the diameter.
millimeter wide
This alternative emphasizes the width of the object.
having a millimeter dimension
This rephrasing focuses on the object possessing a specific size.
with a millimeter measurement
This highlights the existence of a measurement in millimeters.
measuring a millimeter
This emphasizes the act of measuring to find the size.
one millimeter in size
This specifies a concrete size of one millimeter.
at the millimeter scale
This alternative suggests the level of precision or detail being considered.
on the order of a millimeter
This expresses an approximate size close to a millimeter.
in millimeter increments
This indicates changes or variations happening in millimeter steps.
within a millimeter range
This specifies a small variation around a millimeter value.
FAQs
How do I use "millimeter across" in a sentence?
You can use "millimeter across" to describe the size or diameter of an object. For example, "The tiny meteorites, less than a "millimeter across", make up the most precisely dated collection of the debris."
What's an alternative to saying "millimeter across"?
You can use alternatives like "millimeter in diameter" or "millimeter wide" to describe the dimension of an object.
Is it better to say "millimeter in diameter" or "millimeter across"?
Both "millimeter in diameter" and "millimeter across" are acceptable. "Millimeter in diameter" is more specific, while "millimeter across" is a bit more general in describing size.
When should I use "millimeter across" versus "centimeter across"?
Use "millimeter across" for very small objects or measurements requiring precision to the millimeter level. Use "centimeter across" when describing larger objects where millimeter-level precision is not needed.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested