This is exactly what I wanted. I was afraid that 3/8 inch wouldn't be enough, but it really is. In response to some of the negative reviews: 1. For reviews saying the edge pieces are misaligned. THEY DO! There are 4 special edges that are only for corners. You just have to be smarter than the puzzle.2. Yes, it smells like a factory when you first open it, but that's how children's toys are made. We still have to clean toys before we give them to our children.