The phrase "about equal size" is correct and usable in written English.
It can be used when describing two or more objects that are similar in dimensions or volume, but not exactly the same.
Example: "The two boxes are about equal size, making them perfect for stacking."
Alternatives: "approximately the same size" or "roughly equal in size."
In addition to confirming the hypothesis that the sickle-claw was held retracted off the ground, the trackway (made by a large, Achillobator-sized species) showed evidence of six individuals of about equal size moving together along a shoreline.
The master suite's bedroom, bathroom and walk-in closet are all about equal size.
A standard billboard of about equal size would cost about $10,000, but would also require costly installation crews to change displays.
These resembled modern sawflies in having forewings and hindwings of about equal size and in lacking marginal hooklets for joining the two pairs.
The Jats of India are mostly divided into two large communities of about equal size: one Sikh, concentrated in Punjab, and the other Hindu.
The presence of a long tail and two pairs of limbs of about equal size distinguishes newts and salamanders (order Caudata) from other amphibians, although members of the eel-like family Sirenidae have no hind limbs.
For presentational clarity, we dichotomized medical expenditure around the median and created the high and low expenditure groups with about-equal sizes.
Species of Odonata (Damselflies and dragonflies) both have two pairs of wings which are about equal in size and shape and are clear in color.
She concludes that the audiences for the two platforms are actually about equal in size, adding that because newspapers are often read by several people, counting only paid subscribers doesn't provide a clear picture.
The study concludes this fact by saying: "This makes the unaffiliated the third-largest religious group worldwide, behind Christians and Muslims, and about equal in size to the world's Catholic population".
