Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very small

I found the American Baby Sheets and Mattress pads very small for the mattress that actually comes with the pack n play, and extremely thin. When I put them on, they bent the corners of the pack n play mattress, and even did the same to the after-market mattress I bought (but they fit the after-market mattress better). So I'm off to buy the actual Graco version in the hope s that it will be a better fit.