Japanese by Example
Learning through examples in manga

Worth selecting a costume with 〜がいある

藤原くんはだいたい正しい » Volume 1 » Page 172

As a member of the student council, Hitsuji comes up with the idea of having a cosplay theme to help build up excitement among students for the school’s sports day. However, Fujiwara, the student council president, fails to dress up.

Upon hearing him say he doesn’t has a costume prepared, one of the drama club students suggests he pick from their club’s costumes. While Fujiwara isn’t enthusiastic at the prospect of dressing up, Hitsuji is excited by the club’s wide selection.

ヒツジ:
「これだけあると(えら)がいあるね!!一番(いちばん)似合(にあ)うの()つけろね!」
"When there are this many, it's worth it to choose from! Let's find the one that suits you best!"