Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great ball great price BUT WATCH SIZE

I grew up using a Mikasa and got this one for my boy and he loves it. All the kids on his team want to use it. Its time for new one and I looked to buy this one on amazon. But I dont what they are selling. THERE ARE 2 COMPACT SIZES. C 28.5 and j 27.5 which one is amazon calling compact?