there’s no “usually”, in every household every person makes it as they please at each preparation iteration, according to the size of their hands, capabilities, mood, and especially filling. you do cherry for kids - make them smaller, one cherry inside. oh, today your kid wants them full of cherry juice hinkali-style, voila, enormous ones, and the juice drips. same thing with borshch, or other “staples” of Ukrainian cuisine. there are no rules, only slight directions. do as you please.