both in quality and quantity
Used to emphasize that something excels or is sufficient in both aspects—quality and quantity—often in formal or written contexts.
This product is excellent both in quality and quantity.
His research is flawless both in quality and quantity.
Standard kanji spelling for this adverbial phrase.
Variant using 共 instead of とも; less common but still encountered.
Compound of 質量 (quality and quantity) + ともに (both). The phrase is a straightforward combination of its parts.