Sentence:  Another boy 's model is the .22 single-shot Remington 514 C ( around $ 20 ) , which comes with a 21 - inch barrel and a short - 12 - 1 2 - inch - stock ; it <WSD>'s</WSD> just right for a boy of 12 - 1 2 . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)