undersized

/ˈʌndərˌsaɪzd/

The adjective undersized describes something that is smaller than usual. Your Great Dane is undersized if he fits comfortably on your lap.

A normal pony might weigh 450 pounds, while an undersized pony could be only 200 pounds. When something is undersized, it is smaller than average, often significantly smaller. An undersized t-shirt will be skin tight, and an undersized car might draw curious stares as it drives past. It's also correct to say undersize, although undersized is more common.

Definitions of undersized

1. adjective

   smaller than normal for its kind
   synonyms: undersize

   little, small

   limited or below average in number or quantity or magnitude or extent