Undersized (adjective)

Being smaller than is typical or expected.

Origin:

Late 19th century: from under- 'below the usual size' + -sized.

Examples:

1. The undersized fish were rejected because they did not meet the size requirements for sale.
2. The undersized fruit was not as sweet or juicy as the larger ones.
3. The undersized gear made the machine run less efficiently.
4. The undersized football player was a surprising star, despite his small stature.
5. The undersized vase was delicate and unique, but not ideal for a large bouquet of flowers.