Size vs Volume

When to use each in English, with meaning, register, and examples.

Size

Top 1,000 (very common)A2noun

Volume

Top 1,000 (very common)B2noun
 SizeVolume
Pronunciation🇬🇧 /["/saɪz/"]/🇺🇸 /["/saɪz/"]/🇬🇧 /["/ˈvɒljuːm/"]/🇺🇸 /["/ˈvɑːljəm/"]/
Meaninghow big or small something isThe amount of space a substance or object occupies, or how loud something is.
ExampleThe size of the shirt was too small for me.The volume of this box is quite large, making it perfect for storage.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelA2B2
Part of speechnounnoun
Collocationsconsiderable, enormous, fair, adjust, change, control, grow, increase, decline, from the size of, in size, in the size of, given the size of something, half the size of something, two, three, etc. times the size of something, large, medium, small, range, variety, be, take, wear, fit somebody, in a/​your size, be a size too big, small, etc., size matterstotal, interior, internal, calculate, measure, by volume, in volume, sheer, considerable, enormous, increase, decrease, reduce, double, grow, increase, high, loud, full, increase, turn up, decrease, control, dial, knob, at… volume, volume on, bound, leather-bound, companion, series, edit, illustrate, publish, in a/​the volume, volume of, volume on, run to five, several, etc. volumes, bound, leather-bound, companion, series, edit, illustrate, publish, in a/​the volume, volume of, volume on, run to five, several, etc. volumes
Antonymssmall, tiny, minutesilence, quiet, smallness
Common mistakesConfusing 'size' with 'sized'; 'sized' is used as an adjective., Using 'size' where 'amount' would be more appropriate when referring to uncountable quantities., Saying 'the sizes of the shoes' instead of 'the shoe sizes'.Confusing volume with 'amount' when discussing quantity in general., Using it incorrectly as a verb instead of the noun form., Saying 'high volume' when referring to low sound levels.
Usage notesUsed in both formal and informal contexts. 'Size' is suitable for descriptions of objects, clothing, and measurements but is less appropriate for abstract concepts without clear dimensions.Use 'volume' for both physical space and sound levels. It's neutral and appropriate in most contexts, from casual conversations to formal discussions. Avoid using it for abstract concepts like 'volume of work.'

See it in real clips

Size

Frequently asked questions: Size vs Volume

What's the difference between Size and Volume?

Size: how big or small something is Volume: The amount of space a substance or object occupies, or how loud something is.

Which is more advanced: Size and Volume?

Volume is the highest level, at B2, on the CEFR scale.

Are Size and Volume the same CEFR level?

Size: A2, Volume: B2 on the CEFR scale.

What part of speech are Size and Volume?

Size: noun, Volume: noun.

Can you show an example of each?

Size: The size of the shirt was too small for me. Volume: The volume of this box is quite large, making it perfect for storage.

Can I use Size and Volume interchangeably?

Not always. Size and Volume are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons