solid little stool but only 7.5" tall not 10" as advertised

I just need this to reach the crank to open the skylight in my bathroom... it's just the right height, but it's unsafe to stand on.... the three legs makes it very tippy. It's just me, so I'm very careful with it, and I don't need to use it all that often, but if I had children using it, or if I used it more. I would've returned it.