smaller size vs larger size

[Mergen]

Business Idiom in English, Intermediate level

ESL/EFL Test #422 "Retail Sales Phrases", question 5

If you think this is too big, we have a ......... size too.

(a) lesser
(b) bigger
(c) smaller
(d) larger

Business Idiom in English, Intermediate level

ESL/EFL Test #422 "Retail Sales Phrases", answer 5

If you think this is too big, we have a smaller size too.

Correct answer: (c) smaller
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Why not larger?

Mergen

[Mister Micawber]

.
Because the current one is already 'too big'.
.
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Native English teacher at Mister Micawber's

[Gheon]

Wiki hints that Lesser is usually used with material nouns (uncountables). Smaller is used with the countables. Specifically, when talking about low size or number smaller is preferred. Is that the case?
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I find your Lack of Faith disturbing!
The Force is out there!

[Beeesneees]

Fewer would be the correct term for countables, at least in the UK.
The people who run most supermarkets get this incorrect, leading to checkouts which are labelled as being for "9 items or less" when it should be "9 items or fewer".
It makes me shudder!
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Cheers m' dears!