Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sizing is horrible, makes the product useless...

I bought this first in x-small for my 5lb Chihuahua/Pomeranian mix. I measured his waist at 12 inch. According to the sizing guide, x-small should have fit him but it was so tiny, it wouldn't even fasten on him. We immediately sent it back and ordered the next size up which is a small. Its WAY to big. If he urinates in this, it will leak. I can fit my whole hand through the leg hole and his tail pops out of it. I can see i'm not the only one who has had this problem. I will never order this again. It was a waste of money. We will most likely return it or have to spend more money to have it tailored. I am very very unhappy with this product.