Tiny and maybe not so powerful
The product photo doesn't give a sense of scale. The package fits in the palm of your hand with room left over, and the actual sheet is about 1" x 2". I'm taking them on a long trip next week, so I tested one in the sink this afternoon with about four cups of water. I don't think one sheet is going to get my little sink of laundry clean, but two sheets might. Since there's 50 in a package, it shouldn't be a problem.
Rating: 3 stars