I've never heard of Caramello bears! I'm sure they were as tasty as Caramellos. I remember as a child my mother sharing a Caramello with me. Very tasty.
I'm assuming by slab you mean bar? If so, I just looked and I see that a milk chocolate US Cadbury bar is 99g. We have a smaller fruit & nut bar that's 65g. A smaller sized Caramello bar is 76g. We have a few different sizes. I like to get the small baggy of bite sized Caramellos. They're dreamy.