The phrase "are equal in size" is correct and usable in written English.
It can be used when comparing the dimensions or measurements of two or more objects or entities to indicate that they have the same size.
Example: "The two rectangles are equal in size, making them perfect for the design layout."
Alternatives: "have the same dimensions" or "are of identical size".
Melodically, the scale resulting from mean-tone temperament is superior to the Ptolemaic (just intonation) scale, for all the whole tones are equal in size, being exactly half a true major third, or 193 cents.
In 5 10 % of patients, the arches are equal in size.
It ensures that the created groups are equal in size and statistically comparable in terms of mean and variance.
Our advertising units in News Feed are highly engaging given that they are equal in size and prominence as content from a user's friends and family.
A particular case arises when α=1/2, i.e. when C and B are equal in size.
Assemblages can serve as units of analysis, but not all assemblages are equal in size or accumulation span.
Within a month of taking control, his force grew to be equal in size to that of the British.
"Hinged Door," in which a barn door's hinge is equal in size to the little white piglet that emerges from the shadows, brings a sense of how the world unfolds around the youngest of nature's creatures.
The market, which is equal in size to the combined value of the stock markets in the five other member states of the Gulf Cooperation Council, is large enough and liquid enough to be attractive.
The gametes may be equal in size (isogamy), or one may be slightly larger than the other (anisogamy); the majority of forms have a large egg and a minute sperm (oogamy).
They speak to something quite basic in us and in our nature, something still developing, perhaps, into feeling or thought, like a frog that wants to be equal in size to an ox and inflates herself so much that she explodes.
