Of less than normal or sufficient size.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "undersized" in a sentence
""All of the people who may be called undersized always do one thing," Mr. Seay said."
"Although the Alpine Corps, as a general thing, contain the largest and strongest men in the French Army, yet the average French soldier may be termed undersized when compared with the military of either England or"
"A tree four feet in diameter is called undersized in these woods; and so skillful are the wood-choppers that they can make the largest giant of the forest fall just where they want it, or, as they say, they "drive a stake with the tree.""