Not just the chest size, she looks... well not really tall but taller than typical? Though I think this seemed different again on a later page.
It's a tall barrel.
Store Manager's Choice!Aye! One "Yuukarin Wiener" coming up!Yuukarin WienerSince we're here and all, I'll just order this "Yuukarin Wiener"!!Not listening.I need to tell Okuu.Let's see... What would be best for snacks, I wonder...?I guess we have to postpone the brewery tour to tomorrow, then.